The Starter Program covers the first 10 users for all but one of their products for $10 (each product, downloadable version) with proceeds going to Room to Read:

http://www.atlassian.com/software/starter/overview

So if your team is 10 users or less, you get all of Atlassian's products for $100.

Atlassian also has bitbucket, which is a direct competitor to github and priced at $10/month for 10 developers or $25/month for 25 developers. So, it's only $240 a year for 20 developers (https://bitbucket.org/plans). It may not have all the features of github, but they provide basic git hosting, wiki, and issue tracking. Do the extra features of github justify 20x higher price?

They also have a free plan for up to 5 developers.

Is Bitbucket something I can install on my own hardware behind my corporate firewall?

I would say that one major distinction is that Github is a tool designed to manage repos and make sharing code easier, with a ticket tracker bolted on. The whole Altassian suite is centered on JIRA, so it's more of a ticket tracker with code viewing and review tools bolted on.

It's a subtle but not insignificant difference and depending on your needs, either one could be a good fit.

A bit confused why you think that is the same feature set of Github. The core product here is JIRA and everything else is accessories. What does Github give you in the way of project/ticket management? Also what is the Crucible equivalent?

I wrote that this is _roughly_ the same feature set.

The equivalent for Code review in Github is the fork/pull request/compare mechanic, which can be used in between repositories as well.

Ticket management: Github Tickets. It also has basic support for Milestone planning etc.

FishEye actually has built-in git management as of the last release, but everything else stands. Plus, FishEye's git handling has always been a bit odd, particularly how it handles branches.