In OS X it’s really simple to install an application: you just drag it into your applications folder. However to uninstall it might not be that linear. For example, I uninstaleed SyncSyncSync, but whenever I opened Terminal.app I’d get a “You have new mail.” message. Reading those messages, I understood there were 2 cronjobs running that would sync my stuff, but I’ve removed that application!
So after some google search, I installed Cronnix and deleted them. I loved this app!