Apps I miss most:
1. ucweb for compressed browsing and superb download manager
2. x-plore the best file manager for symbian. Filebox is cute, total commander is functional, I wish there's file manager which combines the best of those. I wish at least file/folder search and folder property check worked in filebox.
3. Ttpod simply amazing music player with support for lyrics download, album art download, lyrics display, amazing ui, lyrics bar over any other app(at top)
4. j2me environment with good performance, only because nokia decided to leave maemo
5. Nokia beta labs image viewer, can't remember the name.
6. IM Clients to choose from
OMG I am not good at remembering things, I will dig out my pc for must have app folder I had for symbian someday and might add more.