Tiny, free applications you can keep for stashing on a USB thumb drive, for the Mac. These are quick-in, quick-out programs that you can keep with you on a keychain.
iStumbler is a very easy-to-use application for finding AirPort, Bluetooth, Bonjour and other wireless signals and services. It’s had a recent overhaul that gives you lots of extra information about the networks available to you.
Bean is a free rich text editor that you can pop up in a snap. It is compatible with MS Word, however, it uses Apple’s file conversion service to read Word files, so if you have a lot of citations and tables in a Word document it may not behave perfectly
If you read a lot of text on the web all day, try
Tofu. It arranges text on a page in columns, with columns sized properly for the window you have open. You can often see information you’re looking for quickly, without scrolling around.
Adium is a free, simple multi-protocol instant messaging application. With it you can chat with people on AIM, MSN, Jabber, Yahoo and more.
ViewIt is a very quick-to-open image viewer and it supports nearly all common image formats. Also try
ImageWell–a nice application for editing images that has a very small footprint.
Inquisitor is a free application that lets you find information on the web in the same way you find things with Spotlight. Just begin typing and it will start to return sites based on your criteria.
For a very simple, small application that can help you automate backups (including automating daily backups right to your USB thumb drive) try
iBackup. You can also use it to backup your settings for the Dock, your firewall, and much more.
Paintbrush is a Cocoa-based image editor for Mac OS X. It’s very easy to get in and out of, for those times when loading Photoshop is overkill.
Maintenance is a solid, free system maintenance and repair utility, with a version specifically for Leopard. You can use it to repair permissions, delete applications, check hard drive status, and more.
DoBeDo is a useful widget for use with Mac OS X that lets you integrate to-do list items with iCal and your e-mail. To add a new task, you just click on a plus icon, type in the task name and accept your entry.
Paparazzi is an excellent image capture utility for webpages.
Cyberduck is a great FTP software.