This web site has links to old versions of Mac applications. On the home page, there are lists of the most popular old apps and categories of others.
The most popular when I was there this afternoon was Firefox, Limewire, Skype, Internet Explorer, Safari, HandBrake and VLC Player. Of course, the reason to run these older applications are because you are running an older Mac that can’t handle the current versions.
Some of the categories listed are Messengers, File Sharing, Browsers, Music & Video, Image Editing, Misc. Utilities and Office & Editing.
Additionally, there is a list of Newly added Old Version and links to Old Apps for Windows and Linux. There is also a section of news articles and a forum for community with help on supporting these older apps.
See the site here: http://mac.oldapps.com/
