FYI: https://www.bountysource.com/

It would be interesting to see some type of collaboration between similar sites, including:

- http://24pullrequests.com/

- https://www.codemontage.com/

- http://www.codetriage.com/

- http://www.lookingforpullrequests.com/

- https://bountify.co/

- https://www.bountysource.com/

- http://yourfirstpr.github.io/

- http://socialcoder.org/