Is there an internet Git-like repository for collaboration on a paper? I've just started using git for tracking changes in a LaTeX paper I'm writing, and for collaboration with co-authors. 

However, I cannot find easily private git repositories with reasonable plans for scientific collaboration (I'm not asking about discounts, just about a different workflow, so no "one team of n developers", but there are "many small project, with different people").

There is ScribTeX, but unfortunately they are going down :/.

Other:


GitHub free academic plan with unlimited private repositories and number of collaborators
Bitbucket free academic plan with unlimited private repositories and collaborators
Assembla free: priv, but no bug-tracking; next ($9/month): n=3 


So, is there a (La)TeX-oriented Git (or, say, Mercurial) repository service?

That is, I'm looking for a repository (free or reasonably priced - i.e. for one with a PhD student salary, not a programmer salary :))


allowing for:


many collaborators,
many private repositories,

but can have strong limits on:


users per repository,
repository size.
Aditya's comment should be the accepted answer:

Bitbucket offers unlimited private repos for academic users.