Almost all Mac apps incorporate support for languages the World over, allowing every piece of software to be displayed in your native tongue, no matter what it is. But do you really need all the others? And wouldn't you rather have the disk space they take up to use for files that matter to you? Sure you would, and Monolingual will get it for you. It will read through apps, library files and so forth, deleting the language packs you don't need. Use it regularly - we do.
Reg Rating 75
More Info and Download Monolingual
Yes, it's name is a mouthful, but this handy utility provides you with a readout of everything that's stored on your hard drive and where it is - including folders usually hidden by the Finder. Scan your drive and you can quickly see which folders are packed with files, photos, videos or tunes you no longer need, and, at the click of a button, you can delete them to make room for other stuff. This handy tool makes de-cluttering your drive a very straightforward process indeed.
Reg Rating 70
More Info and Download OmniGroup
Free, open-source video transcoder. It just works and has some reasonable default template settings for the non-technically literate (like me).
I haven't had to bother with the Stuffit signup annoyances ever since I discovered "The Unarchiver", which handles at least as many formats (if not more) and is free and open source. The author seems readily available on his site to take bug reports and feature requests too, not that bugs seem too common.
Perian is a free, open source QuickTime component that adds native support for many popular video formats.
This free plug-in gives codec support to QuickTime for all major video formats, including OGG and MKV, as well as subtitle support. While it is a close second to VLC for its formats, the fact that it integrates into QuickTime and therefore exports videos is a huge boon.
Side note: The Squared 5 MPEG Streamclip download link is broken.
i found carbon copy cloner to be a bit annoying. superduper is really easy and the paid version allows you to do stuff i have never needed.