1) I have a lot of short and long lists. Currently they are on post-it-notes all over my desk. I would love an application that would easily manage them and let me view them from the home screen.

2) Latest AbiWord (with Word and OpenOffice support)

3) A better App Launcher with support for single finger launching.

4) A note/sketch program that organizes notes better than Xournal (It would be cool to combine this with #1 if it were light and fast!)

These aren't apps but they are software:

-> Printing support
-> Bluetooth Steero Audio support

Karel, have you tried the SciTe editor?