http://www.developer.com/open/article.php/3905451/60-Great-Open-Source-Products-for-the-Developers-Toolbox.htm
Among the thousands of open source developer tools available -- for key development tasks such as bugtracking, compiling, distributed computing, and version control -- a relative few have managed to distinguish themselves as the best and most popular. To help you sift through all the available options, Datamation.com has published a list of 60 great open source developer tools, conveniently arranged into categories and listed in alphabetical order. In terms of operating systems supported, they write: Even if you're an experienced, informed open source developer tool user, you're bound to make a discovery or two on this list.
60 Great Open Source Products for the Developer's Toolbox
September 27, 2010
Many of these open source developer tools run on a wide range of OSes. In some cases, they support more than a hundred different platforms. For the sake of keeping the list short and readable, we noted whether each developer tool supports the big three -- Windows, Linux and OS X. If you want to know whether a particular tool will run on Solaris or FreeBSD or another platform, you can click the link to check its Web site.
Read the full story at Datamation.com:
60 Great Open Source Developer Tools