Handshake makes it easy to share your contact information and photos with people around you. Works across EDGE, WiFi, and 3g on the iPhone and iPod Touch.
The app is free (AppStore link), but it involves advertising. You can buy Handshake Premium (AppStore link) for $2.99, which is advertisement-free.
Another nice application became free today. The price dropped from $1.99 to $0. The app is called Record (AppStore link). This is audio and voice recorder for iPhone.
Features:
Launch and shake to start recording, or if you prefer, use the button on the lower right toolbar.
Pause and resume recordings.
Search recording titles.
Organise recordings into folders.
Setup smart folders based on keywords, or the location you recorded.
Email recordings from your iPhone (15 minute recordings or shorter).
Rename and reorder recordings.
Seek and pause during playback.
Compressed IMA4 AIFF format.
Records when iPhone is locked.
NOTE: iPod Touch 2nd Gen users will need an Apple headset with microphone to use Record.