I'm in a stage of researching to build my first own custom keyboard. It was very nice to find many guides here. My most favourite ones which were developed for the community are Swill's Plate and case builder tool:
http://builder.swillkb.com/ and Keyboard-Layout-Editor.
Both of them enable people with minimal experience with CAD can get something done with intuative UI and easy-to-use methods.
Now Im beginning to learn about PCB design, and it's would take long because I have no base knowledge about electricity. It's ok to learn, but takes time. And suddenly I have an idea of a PCB design software, which allows users to import their layout raw data. Some nice options maybe to add slots for LED, RGB or to choose which controller to intergrate. The software can determine which diodes should be used for each type of LEDs. The output should be a ready-to-oder file so you can send it to a manufactor of your choice without further editing.
Im not a software engineer nor programmer, so maybe cant help much bringing this to life. But I wanna share the idea, and hope that someone could be interested enough to begin with it.
Thank you for reading and pls spare my bad English ^^
May the clacks be with you.