Mega.ModularPlanner.co.uk has a cool new online modular synthesizer planner for Eurorack-size modules.
It’s a work in progress, but it has modules from the biggest manufacturers already. It’s just missing scanned images from several of the companies.
Note that it does let you do some things that might not be possible with real modules (see the image above).
I’d love to find a Eurorack synth cabinet to match my existing Synthesizer.com cabinet. The Eurorack format suddenly is where everything seems to be happening.