Looking for something that integrates well with existing mac, pc and mobile apps?<p>team collaboration would be nice but not a must as there may be better option for that.
You'll probably like <a href="http://www.redmine.org/" rel="nofollow">http://www.redmine.org/</a><p>From the website: Overview<p><pre><code> * Multiple projects support
* Flexible role based access control
* Flexible issue tracking system
* Gantt chart and calendar
* News, documents & files management
* Feeds & email notifications
* Per project wiki
* Per project forums
* Time tracking
* Custom fields for issues, time-entries, projects and users
* SCM integration (SVN, CVS, Git, Mercurial, Bazaar and Darcs)
* Issue creation via email
* Multiple LDAP authentication support
* User self-registration support
* Multilanguage support
* Multiple databases support</code></pre>
37 Signals BaseCamp is an obvious choice, but it is costly for a start up.<p>I also was interested in project management software and wanted to find something comparable to base camp that was free. I ended up finding one, it's called <a href="http://www.teamlab.com/" rel="nofollow">http://www.teamlab.com/</a>. They seem to have everything base camp does at the same quality level, except it is free. I'm going to be using it for my projects.<p>Has anyone else used this?