At my employer (a visual effects house) we use CentOS, Windows and OSX, with various softwares. The internal code is mostly Python, but there's a bit of C as well.

We are looking for a generic package manager for internal use that can resolve package dependencies and assemble environments with specific versions to make our dev life a little better.

We're currently considering Rez: https://github.com/nerdvegas/rez which (if you've never heard of it) is a Python-powered, software-agnostic, platform-agnostic packager, dependency resolver and environment prep'er.

It's a cool project, but some of us are convinced that someone must have solved the problem of cross-platform packaging and environment handling already.

So far, the only similar project I've found is "conda": http://conda.pydata.org/docs/

Do you guys know any others? What do you use and/or like? I'm all ears.