CodeTriage - Help out your favorite open source projects and become a better developer while doing it.
BountySource - BountySource is a funding platform for open-source bugs and features.
24 Pull Requests - 24 Pull Requests is a little project to promote open source collaboration during December.
Gitpay - Add bounties to solve Git issues from projects.
Designbook - What do all startup founders need? More time, passionate collaborators and investors!
ContribHub - Making it easier to find cool repos to hack on!