Open Source Sponsorship Schemes? (GSoC-like)

Question

We all know about Google Summer of Code, but I was wondering: are there any other / similar sponsorship schemes for open source software? Something that will partly fund ongoing development efforts? If so, under what conditions and conditions?

Answer 1

ESA Summer of Code in Space - open-source space projects http://sophia.estec.esa.int/socis2014/

Rails Girls Summer of Code in Ruby on Rails projects http://railsgirlssummerofcode.org/

- https://gnome.org/opw/