[edw]

Coming soon, if it's not already here in Preview Edition: Eternal Hacktober. Every day GitHub more resembles a gamified social media platform.

[akerro]

Xorg foundation had something like that, I think they also paid for important works before GSoC - both of which have much higher entry level:

X.Org Endless Vacation of Code

https://www.x.org/wiki/SummerOfCodeIdeas/