Loudtalks is a free push-to-talk for Windows Mobile. It utilizes WiFi or your data connection and works between mobile operators and cross borders.
Unlike some of alternatives the communication is real-time and direct (peer-to-peer). Your messages are never stored to the server. There is a free Windows PC client software too so you can talk mobile to mobile, PC to mobile or PC to PC.
Features:
- Push-to-talk
- Contact list with online status
- Voice history
- Sound notifications
- Works over WiFi, 3G, EDGE or GPRS
- Compatible with Windows Mobile 5.0 / 6.0 / 2003 and Windows 2000 / XP / Vista