This table lists GT modules by type, along with the effects they "compare to". 

Rack Effect Modules to Guitar Pedals by Rack Effect Type

Type Module Pedal
 Amp Sim  12K68  Brown Sound In A Box II (Ed Guidry BSIAB II) - many variants
 Amp Sim  12K68 - Summit  Wampler Pinnacle
Amp Sim BeeAll Bee's Knees V1 BJFE Honey Bee Overdrive (3-knob)
Amp Sim BeeAll Bee's Knees AV1  Bearfoot Honey Bee Overdrive (3-knob)
Amp Sim BeeAll Bee's Knees V2  BJFE Honey Bee Overdrive (4-knob)
Amp Sim BeeAll Bee's Knees AV2  Bearfoot Honey Bee Overdrive (4-knob), numerous Honey Bair versions, Sunshine Girl, others
Amp Sim BeeAll Bee's Knees Deluxe  Bearfoot Honey Bee Plus
Amp Sim BeeAll Bumble Bee AV1 Bearfoot Model H v1
Amp Sim BeeAll Bumble Bee AV2  Bearfoot Model H v2
Amp Sim BeeAll Bumble Bee AV3  Bearfoot Model HS
Amp Sim BeeAll Cloudberry BJFE Blueberry Bass Overdrive
Amp Sim BeeAll Elderberry  Mad Professor Blueberry Bass Overdrive
Amp Sim BeeAll Hornet V1  BJFE Model G
Amp Sim BeeAll Hornet AV1  Bearfoot Model G
Amp Sim BeeAll Huckleberry  Bearfoot Blueberry Bass Overdrive
Amp Sim BeeAll Killer Bee  Bearfoot Honey Beest
Amp Sim BeeAll Killer Bee Deluxe  Bearfoot Honey Beest Plus
Amp Sim BeeAll Queen Bee  Bearfoot Uber Bee
Amp Sim BeeAll Queen Bee Deluxe  Bearfoot Uber Bee Plus
Amp Sim BeeAll Red Wasp  Bearfoot Dyna Red Hot Distortion
Amp Sim BeeAll Wasp V1  BJFE Dyna Red Hot Distortion (3-knob)
Amp Sim BeeAll Wasp AV1  Bearfoot Dyna Red Distortion (3-knob)
Amp Sim BeeAll Wasp AV2  Bearfoot Dyna Red Distortion (4-knob)
Amp Sim BeeAll Worker Bee  Bearfoot Silver Bee
Amp Sim BeeAll Worker Bee Deluxe  Bearfoot Silver Bee Plus
Amp Sim BeeAll Yellow Jacket V1  BJFE Sparkling Yellow Overdrive OD1
Amp Sim BeeAll Yellow Jacket AV1  Bearfoot Sparkling Yellow Overdrive OD1
Amp Sim BeeAll Yellow Jacket V2  BJFE Sparkling Yellow Overdrive OD2
Amp Sim BeeAll Yellow Jacket AV2  Bearfoot Sparkling Yellow Overdrive OD2
Amp Sim BeeAll Yellow Jacket AV3  Bearfoot Sparkling Yellow Overdrive OD3
 Amp Sim  Bluesbuster - AA, AT  JHS @ Andy Timmons
 Amp Sim  Bluesbuster - AC  JHS Angry Charlie
 Amp Sim  Bluesbuster - CB  MI Audio Crunch Box, Super Crunch Box
 Amp Sim  Bluesbuster - DM  Marshall Drive Master
 Amp Sim  Bluesbuster - MG  JHS Morning Glory
 Amp Sim  Bluesbuster - POT  Analogman Prince of Tone ("half" of King of Tone)
 Amp Sim  Bluesbuster - SR  Suhr Riot
 Amp Sim  Bluesbuster - V1, V2  vintage Marshall Bluesbreaker, many others
 Amp Sim  Bodhi Drive  Love Pedal Zendrive
 Amp Sim  Boogeyman  Dr Boogie
Amp Sim FET Drive Wampler Plexi Drive
 Amp Sim  GTM-45 BOR  ZVEX Box of Rock
 Amp Sim  GTM-45 CB  JHS Charlie Brown
 Amp Sim  Janhi Drive  Vemuram Jan Ray
 Amp Sim  PlexiSS  Carl Martin Plexitone
 Amp Sim  Prime Minister  Marshall Guv'nor
 Amp Sim  Ripper  Marshall Shred Master
 Amp Sim  Ruby Drive  JHS Superbolt, JHS Ruby Red
 Amp Sim  Timhi  Paul Cochrane Timmy
Boost Angus Schaffer-Vega Diversity System, SoloDallas Storm
 Boost  Bass Boost  EHX Hog's Foot, EHX Mole
 Boost  Color Bomb  Sola/Colorsound Power Boost
 Boost  Crema Boost  Dallas Rangemaster, Keeley Java Boost, Analogman Beano Boost, many others
 Boost  Edge Boost  Boss FA-1 FET Amplifier
Boost FBomb Catalinbread Epoch Pre, Chase Tone Secret Preamp, ClinchFX EP-Pre, Dunlop Echoplex Preamp, MXR Echoplex Preamp, Xotic EP Boost, others
Boost MOAB Univox UniDrive UD-50
 Boost  Queen Boost  Brian May Treble Boost
 Boost  Sabre  Keeley Katana
 Boost  Shrieking Gull  EHX Screaming Bird
 Boost  Sonic Boom  EHX LPB-1, EHX LPB-2
 Boost  Trail Boss  Dallas Rangemaster, Keeley Java Boost, Analogman Beano Boost, many others
 Boost  Treble Boost  Vox Treble Booster
 Boost  Woody  ZVEX Super Hard On (SHO), ZVEX Channel 2
 Buffer  BritBuffer  Pete Cornish Buffer
 Buffer  MultiBuffer - K  "Klon" Buffer
 Buffer  MultiBuffer - M  MOSFET Buffer
 Buffer  MultiBuffer - T  "Tube Screamer" Buffer
Chorus Black Pearl Pearl CH-02 Chorus
 Chorus  Small Chorus  EHX Small Clone
Chorus Stereo Chorus Boss DC-2 Dimension C Chorus, Roland SDD-320 Dimension D rack chorus
 Chorus  VibraChorus  Boss CE-2 Chorus Ensemble, Way Huge Blue Hippo, several others
 Chorus  VibraChorus - Bass  Boss CE-2B Bass Chorus
 Chorus  VibraChorus - CS-505  Ibanez Chorus CS-505, Maxon Insta-Chorus CS-505
 Compressor  Boa Constrictor  Ross Compressor, Keeley Compressor, MXR Dyna Comp, Analogman Comprossor, Way Huge Saffron Squeeze, several others
 Compressor Sultan of Squeeze  Musitronics Dan Armstrong Orange Squeezer
 Delay  Analog Delay AD-10  Ibanez CD-10 Delay Champ
 Delay  Analog Delay AD-4005  Customized EHX Deluxe Memory Man
 Delay  Analog Delay AD-80  Ibanez AD-80 Analog Delay
 Delay  Analog Delay AD-900  Ibanez AD-900 Analog Delay
 Delay  Analog Delay AD-99  Ibanez AD-99 Analog Delay
 Delay  Analog Delay AD-9A  Ibanez AD-9 Analog Delay
 Delay  Analog Delay AD-9B  Ibanez AD-9 Analog Delay
 Delay  Analog Delay AD-DMM  EHX Deluxe Memory Man
 Delay  Analog Delay ADM-2  Boss DM-2 Delay
 Delay  Analog Delay ADM-2W  Boss DM-2W Delay
 Delay  Analog Delay ADM-3  Boss DM-3 Delay
 Delay  Analog Delay AD-XO  EHX Deluxe Memory Man XO
 Delay  Digital Delay - Ocean Blue  Mad Professor Deep Blue Delay
 Delay  Digital Delay - DD  various PT2399-based digital delays
 Delay  Digital Delay - DD Plus  various PT2399-based digital delays
 Delay  Digital Delay - DD Deluxe  various PT2399-based digital delays
 Delay  Digital Delay - DD Super Deluxe  various PT2399-based digital delays
 Delay  Super Nova  t.c. electronic ND-1 Nova Delay
 Distortion  Ben  ProCo Rat (original)
 Distortion  Ben 2  ProCo Rat 2
Distortion Chainsaw Boss Heavy Metal HM-2, DOD FX56 American Metal
 Distortion  D-II  MXR Distortion II
 Distortion  Dirty Ben  ProCo You Dirty Rat
 Distortion  FlatTop  Wampler Triple Wreck
 Distortion  OD-II  Ibanez Overdrive II OD-855 v1 "Flying Fingers"
 Distortion  RR+  MXR Distortion + (Block and Script), DOD Overdrive Preamp 250 (several versions), DOD Overdrive Preamp YJM308
 Distortion  SS+  Pete Cornish SS-2, Top Tone Light Drive
 Distortion  The Other One  Boss DS-1 Distortion (original)
 Distortion  Turbo Ben  ProCo TurboRat
 Distortion  Vintage Ben  ProCo Vintage Rat
 Envelope / Filter  Funkbox  Musitronics Mu-Tron III, Univox Funky Filter, Monacor Effectmatic, EHX Q-Tron, HAZ Mu-Tron III+, MuFX Mu-Tron III and Tru-Tron 3X
 Equalizer  Tone TwEQer7  Boss GE-7 Equalizer
 Equalizer  Tone TwEQer7 - Bass  Boss GE-7B Bass Equalizer
 Filler  Filler Module  GT original, empty module space filler
 Flanger  FL-117  MXR-117 Flanger
 Flanger  Ms Pinky  EHX Electric Mistress, multiple versions
 Flanger  Ms Pinky Deluxe  EHX Electric Mistress Deluxe, multiple versions
Flanger Sweeper A/DA Flanger (various versions)
Flanger The Prince Boss BF-2 Flanger
 Fuzz  American Pi  EHX Big Muff Pi v9
 Fuzz  Army Pi   Sovtek Red Army Overdrive, early Sovtek "Civil War" Big Muff Pi
 Fuzz  Beast Pi   EHX Big Muff Pi v1 Triangle, KR 66#6
 Fuzz  Big Black Pi   Sovtek "black, big box" Big Muff Pi
 Fuzz  Black Pi  EHX Big Muff Pi v3, KR 79#2
 Fuzz  Boosted Pi   Blackout Effectors Musket
 Fuzz  Box Pi   EHX Big Muff Pi v2, KR Box Cap
 Fuzz  British Pi  Pete Cornish G-2
 Fuzz  Bubble Pi  Sovtek "Bubble Font" Big Muff Pi
 Fuzz  ByeBye Pi  EHX Big Muff Pi v6 Tone Bypass, KR Tone Bypass
 Fuzz  Clone Pi   EHX Big Muff Pi v1 Triangle, KR 72#2
 Fuzz  Colossal Pi  MojoHandFX Colossus
 Fuzz  Cow Pi  EarthQuakerDevices Hoof
 Fuzz  Creator Pi   Jordan Creator
 Fuzz  Delta Pi  EHX Big Muff Pi v1 Triangle, KR 66#5b
 Fuzz  Dirt Pi   Hohner Tri-Dirty Booster
 Fuzz  Diver Pi  DiceWorks Muff Diver Finale
 Fuzz  Dream Pi   Sustain Punch Creamy Dreamer
 Fuzz  Egyptian Pi   Black Arts Toneworks Pharaoh
 Fuzz  Elk Pi   Elk Big Muff Sustainar
 Fuzz  Fire Pi  Mad Professor Fire Red Fuzz
 Fuzz  First Pi   EHX Big Muff Pi v1 Triangle, KR 66#5
 Fuzz  Fox Pi   EHX Big Muff Pi v1 Triangle, KR 67#1
 Fuzz  Fuzzball  Skreddy Lunar Module
 Fuzz  Fuzzbender 1.5  Sola/Colorsound Tonebender Mk 1.5 (2 transistors)
 Fuzz  Fuzzbender 1.5-V  Vox V828 Tonebender (2 transistors), Vox V829 Tonebender (2 transistors)
 Fuzz  Fuzzbender I  Sola/Colorsound Tonebender Mk I
 Fuzz  Fuzzbender I-H  Tonebender Mk I (Gary Hurst)
 Fuzz  Fuzzbender II  Sola/Colorsound Tonebender Mk II Pro (germanium)
 Fuzz  Fuzzbender II Si  Sola/Colorsound Tonebender Mk II Pro (silicon)
 Fuzz  Fuzzbender II Supa  Marshall SupaFuzz
 Fuzz  Fuzzbender III  Sola/Colorsound Tonebender Mk III (germanium)
 Fuzz  Fuzzbender III - BBB  Baldwin-Burns Buzzaround
 Fuzz  Fuzzbender III - PFS  Park Fuzz Sound
 Fuzz  Fuzzbender III - SB  Fulltone Soul-Bender (original)
 Fuzz  Fuzzbender III - TB  Tone Burner
 Fuzz  Fuzzbender III - V  Vox Tonebender Mk III
 Fuzz  Fuzzbender III - YB  Prescription Electronics Yard Box
 Fuzz  Fuzzbender III Si  Sola/Colorsound Tonebender Mk III (silicon)
 Fuzz  Fuzzbender I-Z  Hornby-Skewes Zonk Machine
 Fuzz  Fuzzifaction 1  Maestro FZ-1
 Fuzz  Fuzzifaction 1A  Maestro FZ-1A
 Fuzz  FuzzMixer  Fender Blender (original)
 Fuzz  Fuzztavia  Tychobrahe Octavia, Roger Mayer Octavia
 Fuzz  Green Pi   EHX Big Muff Pi v1 Triangle, KR 66#11
 Fuzz  Highball  Skreddy Screwdriver
 Fuzz  Honcho  Jordan Boss Tone, Voodoo Lab SuperFuzz
 Fuzz  IC Pi  EHX Big Muff Pi, op amp versions
 Fuzz  Inversion Fuzz  GT original, similar to Emma Electronic ReezaFRATzitz, Craig Anderton Tube Sound Fuzz, Moosapotamus Tube Steak Fuzz, Way Huge Red Llama, and other inverter chip drive/fuzz circuits
Fuzz JP4 Pi Skreddy Top Fuel (early)
 Fuzz  Jumbo Pi   Sola/Colorsound Jumbo Tonebender, other Jumbo Tonebender variants
 Fuzz  KGB Pi  Skullytone Russian Spy
Fuzz Nitro Pi Skreddy Top Fuel (later)
 Fuzz  Nuclear Pi  Earthbound Audio Supercollider
 Fuzz  OD-850 Pi   Ibanez OD-850 v1 and v2, Maxon D&S OD 801
 Fuzz  OD-9 Pi   Ibanez OD-850 v3, Ibanez OD-9 (original)
 Fuzz  Petite Black Pi   Sovtek "black, small box" Big Muff Pi
 Fuzz  Pickled Pi   Way Huge Swollen Pickle (original)
 Fuzz  Piglet Pi   MojoHandFX Iron Bell
 Fuzz  Pink Pi  Skreddy Mayo
 Fuzz  Pork Pi  Skreddy P19
 Fuzz  Purple Pi   EHX Big Muff Pi v2, KR Violet v2
 Fuzz  Ram Pi   BYOC Large Beaver (Ram's Head)
 Fuzz  Red Pi   EHX Big Muff Pi v3, KR 76#3
 Fuzz  Shiney Fuzz  Univox SuperFuzz, Shin Ei SuperFuzz
 Fuzz  Starship Fuzz  Roger Mayer Axis Fuzz
 Fuzz  Supa Pi  Sola/Colorsound Supa Tonebender
 Fuzz  Tall Pi   Sovtek later "Civil War" Big Muff Pi, Sovtek "Tall Font" Big Muff Pi
 Fuzz  Top Pi  Top Tone DG-2
 Fuzz  V1 3uF Pi   EHX Big Muff Pi v1 Triangle, KR 66#8
 Fuzz  V1 72 Pi   EHX Big Muff Pi v1 Triangle, KR 72#1
 Fuzz  V2 47 Pi   EHX Big Muff Pi v2, KR 47
 Fuzz  V2 73 Pi   EHX Big Muff Pi v2, KR 73
 Fuzz  V2 75 Pi   EHX Big Muff Pi v2, KR handrawn 1975
 Fuzz  V2 751 Pi   EHX Big Muff Pi v2, KR 75#1
 Fuzz  V2 76 Pi   EHX Big Muff Pi v2, KR 76#1
 Fuzz  Violet Pi   EHX Big Muff Pi v2, KR Violet v1
 Fuzz  Vixen Pi   Guild Foxey Lady
 Fuzz  White Pi   EHX Big Muff Pi v2, KR White Can
 Fuzz  Woodchuck Pi  BYOC Large Beaver (Triangle)
Fuzz Woodstock 108 Analogman Sunface BC108
 Fuzz  Woodstock Ge  Fuzz Face (original, germanium) multiple brands, many variants
 Fuzz  Woodstock Ge 69  Fulltone '69
 Fuzz  Woodstock GT Ge  GT custom germanium Fuzz Face
 Fuzz  Woodstock GT Si  GT custom silicon Fuzz Face
 Fuzz  Woodstock JH-F1  Dunlop JH-F1 Fuzz Face
 Fuzz  Woodstock Jimi  germanium Fuzz Face with Jimi Hendrix mods
 Fuzz  Woodstock MJM  MJM London Fuzz (germanium)
 Fuzz  Woodstock Si  Fuzz Face (original, silicon) multiple brands, many variants
 Fuzz  Woodstock Si 70  Fulltone '70
 Fuzz  Woodstock Si/Ge  Easy Face
 Fuzz  Woodstock TSF Ge  Cesar Diaz Square Face (germanium)
 Fuzz  Woodstock TSF Si  Cesar Diaz Square Face (silicon)
 Fuzz  ZonkBox Marc II  Hornby-Skewes Shatterbox
 Overdrive  Barrettone  Selmer Buzztone
 Overdrive  Blue Grit  J. Nagy Blue Magic
 Overdrive  Blues Booster  Boss BD-2 Blues Driver
 Overdrive  Color Drive  Sola/Colorsound Overdriver
 Overdrive  Green Light  Mad Professor Little Green Wonder, other Ibanez Tube Screamer variants
 Overdrive  GT-820  Maxon OD-820 Overdrive Pro, Maxon VOP-9 Vintage Overdrive
Overdrive GT-830 Maxon DS-830 Distortion Master
 Overdrive  GT-855  Ibanez OD 855 v2 and v3, Maxon D&S II OD-802
 Overdrive  Inversion Drive  GT original, similar to Emma Electronic ReezaFRATzitz, Craig Anderton Tube Sound Fuzz, Moosapotamus Tube Steak Fuzz, Way Huge Red Llama, and other inverter chip drive/fuzz circuits
 Overdrive  Neurotic Drive  Fulltone OCD (multiple versions)
 Overdrive  Obsidian Drive  Blackstone Appliances Blackstone MOSFET Overdrive
 Overdrive  Pandora's Box  Bixonic Expandora
 Overdrive  Teledrive  Nobels ODR-1
 Overdrive  The One  Boss OD-1 OverDrive
 Overdrive  Unicorn  Klon Centaur
 Overdrive   Virago Bass  Ibanez Tube Screamer for Bass
 Overdrive  Virago Black  Lovepedal Eternity (black)
 Overdrive  Virago Burst  Lovepedal Eternity (burst)
 Overdrive  Virago CJOD  Clay Jones Overdrive, Landgraff Dynamic Overdrive
 Overdrive  Virago FD1  Fulltone Fulldrive 1
 Overdrive  Virago FD2  Fulltone Fulldrive 2
 Overdrive  Virago FD2M  Fulltone Fulldrive 2 MOSFET
 Overdrive  Virago Forever  Lovepedal Eternity (original)
 Overdrive  Virago GS  BBE Green Screamer
 Overdrive  Virago Kanji  Lovepedal Eternity (Kanji)
 Overdrive  Virago MOSFET  Ibanez Tube Screamer with MOSFET technology
 Overdrive  Virago PD  Wampler Paisley Drive
 Overdrive  Virago RTO  Fulltone Robin Trower Overdrive
 Overdrive  Virago SD1  Boss SD-1 Super Over Drive
 Overdrive  Virago SOS  Jack Orman Son of Screamer
 Overdrive  Virago TS-808  Ibanez TS-808 Tube Screamer
 Overdrive  Virago TS-9  Ibanez TS-9 Tube Screamer
 Overdrive  Virago Zoo  Lovepedal Kalamazoo
 Phaser  GT-90  MXR Phase 90 (script and block)
Phaser Little Rock EHX Small Stone
 Phaser  OptiPhase  Mutron Phasor II
 Phaser  SwirlOVibe  Univibe and several univibe derivatives such as FoxRox AquaVibe
 Phaser Virtuoso Phaser  Maestro MP-1 Phaser
 Power  18V Power  GT original power module, compare to numerous power supplies
Power Warthog GT original power module, compare to numerous power supplies or bricks, boxful of transformers
 Reverb  Digital Reverb  GT original digital reverb, compare to others using Belton Reverb ICs
 Reverb  Ratverb  Realistic Electronic Reverb 32-1110
 Reverb  Tube Reverb  GT design, compares roughly to old tube spring reverbs, not derived directly from any particular vintage reverb
 Routing  ABY  numerous ABY switch pedals
 Routing  Amp Pass Thru  GT original module
 Routing  Amp Selector  various transformer-isolated amp selector switch pedals
 Routing  Bypass Looper  numerous looper pedals
 Routing  Guitar Pass Thru  GT original module
 Routing  In/Out Pass Thru  GT original module
 Routing  Mixer  various mixer pedals
Routing Mudslinger GT original design
 Routing  Swapper  various effects order switching pedals
 Switching  Rack Switch DIN  GT original module
 Switching  Rack Switch VGA  GT original module
 Switching  Switch +  GT original module
 Switching  Switch X  GT original module
 Tremolo  ColorTrem  Sola/Colorsound Tremolo
 Tremolo  LeoTrem  EA Tremolo
 Vibrato  VibraChorus  similar to various vibrato pedals, but none in particular