I thought it might be useful to compile a list of apps we know won't work on Leopard (in case there are any mission-critical apps people need that won't work) and details of when updates are due (if known). The list so far is on MacRumors Guides here (thanks to BigAndy). Please add further updates there as well as posting in the thread (preferably if you have confirmed directly with the developer regarding compatibility and an expected fix date, if any). Thanks!
[embedguide]List_of_Applications_Not_Compatible_with_Leopard[/embedguide]
[embedguide]List_of_Applications_Not_Compatible_with_Leopard[/embedguide]