HipChat could be added, which is one of the best group chat services.
124 karma · joined May 5, 2012
Anyways, the stack is part of your app. You can either write it yourself or build on existing components. Sure you can build your stack on top of more traditional technology, and likely there will be more potential candidates but finding good developers will be just as hard.
I guess my main point was that from my personal experience, writing less code and writing clean code leads to less bugs.