Free/cheap tools to use for intranet, proj. & issue tracking and code hosting?

So far I've been using Jira+SVN in a local (old) server (so Jira is not fast and fisheye is not possible).<p>However, now we will be setting up the company and also collaborating with a couple freelancers in some projects, so we need something more.

We're going with Google Sites for company intranet and (light) project tracking websites (mostly just to manage high-level tasks, documents, discussions, milestones and calendar). Then we're going with Jira+Bitbucket (and therefore) mercurial for issue tracking and code hosting.

So far, this has only costed us 10$ for the Jira license. When/if we get more developers, eventually we will either start paying bitbucket or find an alternative.

I'm wondering if someone else has suggestions. The idea is to cover "everything" from company intranet to code hosting. Any additional tools that could help in other fields important for a startup are also welcome