Schematic Heaven
- A free download site for hundreds of vintage guitar & bass effects schematics. Keep your vintage gear alive and playing.
- http://www.schematicheaven.com/

PedalHeaven.com - guitar-effects museum
- Loads of Pictures of Guitar Effects and Pedals!
- http://www.pedalheaven.com

Guitar Effects Information Repository
- A huge repository of guitar effects resources, including: reviews, sound samples, experts advice forums, etc.
- http://www.noiseon.com

Pedaldoc
- The site of a Spanish company selling mod kits for guitar effect on the net. Pedaldoc ships worldwide the same day that their kits are purchased and the shipping costs are included in the price of the kits.
- http://www.pedaldoc.com

the BIG MUFF and GUITAR EFFECTS Museum
- the BIG MUFF and GUITAR EFFECTS Museum. Electro-Harmonix, Sovtek, Modern & vintage . Guitar effects Pictures, Links, Blog...
- http://www.big-muff.net

Indyguitarist Effect Pedals
- Learn how to modify or build your own effect pedals, one year technical support included.
- http://www.indyguitarist.com/

Loco Box
- Information on the Loco Box Effects Pedals of the 70's and 80's.
- http://www.locobox.com/

FuzzEffect
- A history of the Guitar Fuzz Pedal, the Effect that changed Rock Music Forever!
- http://www.fuzzeffect.com

MJM Guitar FX
- Handbuilt quality effect pedals, and information on each different pedal.
- http://www.mjmguitarfx.com/

Jacques Stomp Boxes
- Host's a variety of Stomp Boxes and information on each of the offered products.
- http://www.jacquesstompboxes.com/

Effectronics
- Has schematics, theory, and a beginners page for those looking to build Effects Pedals.
- http://www.j.philpott.com/effectronics/

Mu-Tron
- History of the Mu-Tron Effects Pedals.
- http://www.beitec.com/stomp.htm

Mode Zero Catalog of Effects with Sound Files
- Offers Sound Files for a large number of different Effects Pedals and makes it easier for a person to choose between the different types of Effects Pedals available.
- http://www.modezero.com/

Lehle Switching
- Lehle Switching Effect Pedals that have increased stability, and switches that provide excellent signals. Also has information on their Pedals and how the switches effectively increase the signal.
- http://www.lehle.com/

Keeley Effects
- Modded Pedals, custom pedals, and their own pedals. Keeley Effects offers modded pedals that give a little more than the originals.
- http://www.robertkeeley.com/home.php

Ibanez Tube Screamers
- Tons of Information about the Ibanez Tube Screamer effects pedal, mods, sound samples, reviews, and more.
- http://www.analogman.com/ts9.htm

Foxrox Electronics
- Shows the different types of FoxRox Effect Pedals, as well as offering information and sound clips for each Pedal.
- http://www.foxroxelectronics.com/

Envelope Filters
- Gives detailed information on how Envelope Filters work.
- http://www.elliott-randall.com/ecf.htm

Carl Martin Effects
- List's of products, reviews, and information on the Carl Martin Effects Pedals.
- http://www.carlmartin.com/index.htm

BossArea - Compact Pedal Reference
- Descriptions of the available pedals.
- http://www.bossarea.com/

Guitar Pedals- Buying Guide
- A buyers guide for those looking for information on buying the right pedal, multi effect pedals, racks, modeling, what to look for.
- http://www.sweetwater.com/shop/guitars/guitar-pedals/buying-guide.php

Guitarsite.com
- Information about effect pedals, effects explained, effects loop, building your own, Tone and Effects placement.
- http://www.guitarsite.com/effects.htm

An Evaluation Of Effects And Pedals- Vox Wah Wah
- History of the Vox Wah Wah, interesting information, interviews, how to tell if you have a Classic Wah.
- http://www.analogman.com/kraft.htm

Yamaha Magic Stomp
- Official site for their effects processor with download section for new patches.
- http://www.magicstomp.com/

G2D Guitar Pedals
- Handmade guitar pedals designed for blues, country, jazz, pop, rock, and metal from New Zealand.
- http://www.g2d.co.nz/

Tonefrenzy
- Effects information, many sound samples with reviews also for guitars and discussion board.
- http://www.tonefrenzy.com/

Grail Tone
- A database of tone settings for a variety of amps and effects; also has articles, reviews and a forum about Mesa Boogie amps.
- http://www.grailtone.com/

Tone Settings
- A database of amplifier settings to create a range of sounds.
- http://www.tonesettings.com/

Zoom 505 Central
- Unofficial resource; includes a library of patches, details of factory defaults, manual, and instructions on building an expression pedal.
- http://www.safaricomputers.com/505/

The TC Electronic G-Force Page
- Unofficial site about the TC Electronic G-Force guitar effects processor. Includes information about setup, blocks, programming and tips.
- http://g-force.info/

MacKinnon, Alistair
- Discusses digital guitar effects, pitch scaling, and software modelling. Also contains articles on software quality and business.
- http://homepages.inspire.net.nz/~jamckinnon/

DiscoFreq's FX Site
- A library of effects; includes product listings, technical details and schematics, and do-it-yourself projects.
- http://filters.muziq.be/

The Talkbox FAQ
- The "talking guitar effect". Includes commercial models, historical data, discography of recorded examples, and plans to build your own.
- http://www.blamepro.com/talkbox.htm

Effectsdatabase.com
- A searchable database containing information and reviews for effects, for those considering purchasing a specific model, or are trying to find the right model for their needs.
- http://www.effectsdatabase.com/

Harshnoise.com
- Information, pictures and reviews of effects and electronic equipment.
- http://www.harshnoise.com/

Smallbox Effects
- Graphical layouts and schematics for popular effects aimed at the beginning builder of guitar effects.
- http://smallbox.zeonhost.com/

Runoff Groove
- Features DIY (do-it-yourself) guitar effect pedals, with articles on selected effects schematics; includes sample mp3 clip.
- http://www.runoffgroove.com/

Aron Nelson's Stompbox page
- An archive of schematics, links, resources, and a message board for subjects related to effects and electronics.
- http://www.diystompboxes.com/

Zoom BFX-708 Patch Database
- On-line database of patches for the Zoom BFX-708 bass guitar multi-effect unit.
- http://grower.cz/bfx

Guitar Wiring and Modification
- Guitar wiring and modification. Photos and wiring diagrams and links to modify a Fender Stratocaster to humbucking pickups.
- http://www.christianmusicweb.com/Guitar_wiring.html

AMZFX
- Effects and audio projects and schematics including a collection of vintage circuits. Features articles and a newsletter.
- http://www.muzique.com/

Zoom GFX-707 Patches
- Database of patches and information about the GFX-707 multi-effects unit; includes a discussion forum.
- http://gfx.curvedspaces.com/

The Guitar Effects Oriented Web Page
- Information on effects, DIY projects, technical aspects, and tube amps.
- http://www.geofex.com/

The Korg A-Series Page
- Information, resources, and discussion regarding the Korg A3, A2, and A1 effects processors.
- http://korgaseries.org/