We all have the need to find software that is actually useful occasionally, even more so when we are operating in a linux environment.
Taken from forum-replies.cfm?t=797838, this wiki is all about what people find the most useful software to use with linux.
This list is by no means complete, as only posts with links were added [...]

(Mostly Macbook & intel ready applications in alphabetical order)
{most programs can run on other Macs}

AcidSearch - adds flexibility to the Safari search box.
AntiRSI - Take breaks from your computer.
Adium - This instant messanger replacement can do all the major chats, but I still am a iChat fan. Real-time video conferencing is keen.
Apimac Timer - Use [...]