GeekTool - show system logs, command-line output on desktop.fseventer - graphically observe filesystem changes.BetterTouchTool - add more gestures to the Apple Magic Mouse.Mouse Locator - easily find cursor on the screen (good for large screens).QuickSynergy - share mouse and keyboard between multiple computers.Dock Dodger - prevent a running application from appearing in the Dock.WordService - powerful text manipulation via the services menu.iAlertU - alarm/notification security for Mac laptops.Prey - Track a stolen laptop (iOS/Linux/Windows devices, too).ControlPlane - automatically configure settings based on your location/context.Omni DiskSweeper - show size of all directories and files in a browseable hierarchy (like a GUI for 'du -ah' at the command line).The Unarchiver - decompress a variety of formats (also on Mac App Store).Growl - system notifications (not all versions are free, but supposedly all source code is downloadable).AppleJack - troubleshooting, system repair/maintenance.OnyX - system maintenance, turn on hidden features.Dropbox - online file synchronization that looks and acts like a folder in the Finder (yes, that is my referral URL :).Octave - For doing numerical computations, like Matlab.Emacs Speaks Statistics - Code and run R in Emacs.PsychoPy - good experiment complement to PyEPL (e.g., plays video).PyEPL - library for coding psychology experiments in Python.Scipy Superpack - Python scientific stack (Numpy, Scipy, Matplotlib, ipython, pandas, Statsmodels, Scikit-Learn, and PyMC), installed via homebrew.Anaconda - full Python distribution for scientific computing.

Tofu - display text in an easier-to-read format.MassReplaceIt - replace a string in multiple files/filenames.Day-O - menu bar clock replacement with a calendar.Itsycal - menu bar calendar, shows date and events.Flux (f.lux) - Adjust computer display hue for night time use.SelfControl - stop procrastinating by preventing access to particular websites/domains for a set period of time.Evernote - keep track of notes, syncs across computers and iOS devices (also on Mac App Store).Wunderlist - to-do list that synchronizes across computers and iOS/Android devices (also on Mac App Store).Sync wirelessly with iOS devices using a SimpleNote account.(many plugins for other actions check the plugins page) Quicksilver - application/file launcher, etc.It is a good idea to eject the disk image and delete the. NB for installing applications: After you mount a disk image, be sure to copy the application from the disk image to your Applications folder before running it.Here's another good list, if also a bit out of date:.NB: I try to keep this list updated, but unfortunately it may be sorely out of date.Free/open-source software for Mac OS X Free/open-source software for Mac OS X

Dock dodger for mac