Can anyone recommend something other than Asset Server?

I have a question, can anyone recommend something either for free or paid that can handle project control?

I know there is Asset Server but it's a bit expensive at this time.

Thank you for your advice.

Depending on your requirements, you could just use a traditional revision control solution like Git, Mecurial, etc.

Unity has a lot of binary files (at least the free version does) which cannot be merged which can be problematic for collaboration with version control. I believe UT changed the Pro version to make it more compatible with traditional version control.