- K9: famous mail client (I myself only use Google's Gmail client, though.)
- andLess: music player with FLAC support
- arcMedia: support a lot of formats and without ads
- Trolly: shopping list
- QuickPic: fast and lightweight image browser
- Slient Camera: take photos without shutter sound (it uses the preview function, so quality is bad)
- Simple Camera: take photos using volume key, very handy when you need to take a lot of photos
- GPS Essentials: lots of GPS related small tools
- DailyRoads Voyager: continuously record videos and capture photos with GPS info
- Open GPS Tracker: record GPS trackers
- APG: gunpg for android
- Apps Organizer: organize your apps with labels and add shortcuts to home screen
- Barcode Scanner: scan bar code
- Bluetooth file transfer: transfer files via bluetooth
- Book catalogue: catalogue your books
- Charmap: character maps
- ConnectBot: ssh client
- DiskUsage: disk usage virtualizer
- Ghost Commander: two panel file manager, very handy when organizing files
- Go Contacts: search via numbers
- Handcent SMS: more powerful SMS, for example, search SMS and backup SMS online, but I dislike its UI
- iCal Import/Export: backup your calendar to SD card
- NetCounter: count network usage
- Open Manager: my main file manager
- SL4A: bring bash, python, ruby, lua, etc to android
- Terminal Emulator: we need a terminal seriously
- TextEdit: a simple text editor
- Timeriffic: switch your phone modes based on time
- Units: unit converter
- VuDroid: djvu viewer
- WiFi Advanced: advanced settings, usually not neccessary
- 倉頡解碼: lookup Cangjie code