One of the more empowering tools working in IT is automation tools. Some of my time best spent in past few weeks has been devoted to deploying a WIKI, a SCM System (SVN), a Bug Tracking System (Mantis), etc.
Notice how all these are open source. At the same time, there are plenty of commercial alternatives to each of these. One Company whose products excel (I think) is Atlassian. My issue is that, while their offerings are fantastic; there is usually an open source alternative which, while not as feature rich, is more than feature complete to cater to my needs.
However, yesterday they started offering a starter licensing program where you can buy any of their products for ten dollars each. Looking at their details page, it is easy to see how much ass kicking one gets for $60.00.