i use spb PocketPlus (not free but i love it), pocket digital clock (free) and pocketmusic (not free, but really great app, especially if you use your device as an mp3 player like i do).. and for the task manager, i use WkTASK, which is the best thing i have found and it's free! ...here are some screen shots:
phone1.jpg phone2.jpg phone3.jpg phone4.jpg
*ps.. i am using indagroove's poco TF3D-free rom*