Still playing around FC6 and stuff included :). This time I came around the TomBoy Notes applet for GNOME which provides user with a feature of creating notes. I have seen similar stuff many times (including KNotes in KDE), but this one is much better just because of one additional feature: you can link some text of one note to a other note.
It looks like some simple Wiki for desktop. Very handy. Sometime I just have too many things which are related but are too much to be put on one note. With TomBoy, I can have all my ideas, todos and other stuff organized and easy accessible.