Google's mail service.
Resources:
- My Initial Take On It
- Their MIDP applet (go there with a WAP browser)
- Mobile Phone Proxy - reparses Gmail as WAP
- Windows system tray notifier, Mac OS X menu bar indicator for new messages.
- Python tools for importing mbox files to Gmail, exporting messages from Gmail
- POP3 proxy
- libgmail
- Firefox XUL Extension
- Gmail-lite - a pure HTML front-end for PDAs and mobile phones