I understand you're annoyed, but couldn't really see your point at first, unless of course they "stole" anything from you.
That just looked like basic competition at first sight? I think there are many such solutions on the market already, and there probably were when you released yours.
Are you annoyed just because they are funding their projects on Kickstarter, whereas maybe you had to do your own project with your own funds?
As someone said above, you could use Kickstarter as well. It's not necessarily the ideal deal either though, because it comes with constraints you may not want to deal with as a business, like having to describe too much of a future product before it even exists (which is not always that great...)
Now, what I can understand with all this is the following. Do some of those crowd-funded projects, and startups, have the potential to harm the business of others (in more ways that mere competition)? Actually, I think so. They give a false sense of profusion of offering to potential customers, which is not exactly normal competition. It's virtual competition taken to an extreme. Many of those projects (didn't say all...) are actually badly designed, end up not getting delivered, etc, and if nicely funded, don't cost anything much to their authors. That's twisted competition, and tends to make people forget about what's a good product backed by a decent company. The notion of "product" itself tends to become fuzzy.
Are a fraction of all people getting projects crowd-funded some kind of spongers? I think so. Especially the serial-campaigning ones...