Anyone who does development in an environment with more than one person is intimately familiar with version control. I moved from CVS to Subversion a couple of years ago, and never looked back. On my Windows machines, I use TortoiseSVN quite a bit as it makes SVN tasks at-a-glance far easier to deal with. I found a similar tool for Mac OS X called
SCPlugin, attempted to compile it, and found that it was PowerPC only.
For those of you interested in an Intel version,
I found one.
Wow, two posts in a day!