I've used SCPlugin for Subversion access on the Mac desktop, it has a similar feel to TortoiseSVN on Windows. I would also tinker with Apple's Automator (a bui

I've used SCPlugin for Subversion access on the Mac desktop, it has a similar feel to TortoiseSVN on Windows. I would also tinker with Apple's Automator (a built-in application) and look at the Finder's Folder Actions (which Automator supports). With surprisingly little effort, you can create some very powerful commands to use when right-clicking desktop items. Finally, perhaps the Mac equivalent of a "registry hack" is the command-line "defaults" program (also built in). It allows you to explore and change the preferences of many programs. You can turn on hidden features and other cool stuff that way.