There is no such a thing as "technical co-founder". A developer can start and test a project faster alone. Smart "business" guys with money sometimes meet with someone that could do it alone and find a way to share the ride. If you want to develop something, I'd suggest you to learn how to develop. Or spend enough money to hire someone to do so. But for free, as a "co-founder", it'll always be hard and when it happens, usually it don't last long. And the fault is on the "business" side. Technology is not about business. If you start a free/open source project with a great purpose, you'll find tons of developers willing to help your endeavour.
