User interface

• International keyboard with Windows binding
• iGlasses, a tool to enhance the quality of the picture used when doing video over iChat. (cost: $8)
• Synergy iTunes plug-in, to control iTunes from the Finder. (cost: < $10)
• Desktop Manager, a virtual desktop for the Mac (free)

Security

• Gorilla Password, a password manager compatible with PasswordSafe. (free)

Edition

• TeXShop, a simple yet powerfull editor for TeX. (free)

Multimedia

Development

• MAMP, the equivalent to easyPHP, provides Apache, PHP and MySQL for Mac OS X. (free)

Hacks

• Switch Dashboard on and off:

  # To turn Dashboard off:
  defaults write com.apple.dashboard mcx-disabled -boolean YES
  # To turn Dashboard on:
  defaults write com.apple.dashboard mcx-disabled -boolean NO
  # You have to restart the Dock after making either change for it to take effect:
  killall Dock
  

  See http://www.macosxhints.com/article.php?story=20050723123302403&lsrc=osxh

Other resources

• http://www.chemistry.ucsc.edu/~wgscott/xtal/usefull_stuff.html