Bergfotron
- Analog modular synthesizer plans and pictures in great detail.
- http://hem.bredband.net/bersyn/

SynthDIY.com
- SynthDIY.com has been put online to gather ALL information about making your own musical instruments. The goal is to have all DIY / Mods / profit / nonprofit products on this site.
- http://www.synthdiy.com/

Synthesizer Projects
- Analog synthesizer DIY projects and modifications to vintage synthesizers.
- http://www.colinfraser.com/

Jim Patchell's DIY Synth Page
- A site dedicated to those who enjoy building their own electronic musical instruments.
- http://www.oldcrows.net/~patchell

DIY Oakley Modular Synthesiser
- Site dedicated to construction of a synthesiser based on Oakleysound modules
- http://www.techman.synth.net

Dave's Hot Rod MOTM Shop
- Offers a source of mods for SynthTech MOTM modules.
- http://www.hotrodmotm.com/

Resonant Frequency
- Website devoted to analog synthesis. Topics ranging from do-it-yourself projects, modifications to commercial gear and links to other sites.
- http://www.hoohahrecords.com/resfreq/index.html

Synth'r'us
- Original analog synthesizer schematics.
- http://www.uni-bonn.de/~uzs159/index.html

Electronics 4 Music
- Numerous PCBs available for modular synth builders.
- http://www.ele4music.com/

Ken Stone's Modular Synthesizer
- Many unusual circuits for a modular synth. PCBs for sale.
- http://www.blaze.net.au/~sasami/synth/

Synthaholic's Electronic Music Site
- PAiA Fatman mods, part substitution information, OTA tutorial.
- http://home1.gte.net/res0658s/electronics/

Magnus Danielson
- Offers resources (books, schematics, companies, links) for the DIY enthusiast.
- http://home.swipnet.se/cfmd/synths/

Electronic Music Projects
- Rick Jansen's synth projects (Formant and Moog) and home of the Synth-DIY email list.
- http://www.euronet.nl/~rja/Emusic/

Littleman
- A custom synth drawing from EFM and Paia designs.
- http://www.itn.liu.se/~nikro/littleman/littleman.html

Synthesis Technology
- Source for CEM chips, MOTM modular sythesizer kits (and mods), tips for DIYers, and Synergy refurb information.
- http://www.synthtech.com/

Analog Synthesizers
- Web resources for the do-it-yourselfer
- http://web.syr.edu/~rsholmes/music/synth/diy.html

Synth-DIY Mailing List
- A mailing list for people who are into synthesizer electronics and/or building synthesizers.
- http://www.euronet.nl/~rja/Emusic/Synth-diy/

Chris's Synth DIY Page
- Home of the Evenfall Minimodular and Chris' other synth circuits.
- http://www.evenfall.com/diy/index.html

Juergen Haible
- Home-built synthesizers, effects, schematics, and CDs of Juergen's music.
- http://home.debitel.net/user/jhaible/hj.html

Grant Richters Synth-DIY page
- Unusual signal modifiers/shapers with schematics.
- http://www.musicsynthesizer.com/DIY/Grant/grant_richters_synthdiy.htm

Blacet Research
- Analog synth kit manufacturer; many odd and useful FracRak-compatible modules.
- http://www.blacet.com