L0K8 is a small Windows program that updates Twitter whenever you change location. Later on I may add a Facebook app or webhooks or whatever folks would find useful for rebroadcasting their location information. There are no ads or spyware.

Known Issues
1. You can't change your username or password and there's no password reset functionality.
2. You can't syndicate your location information other places than Twitter (e.g. using GeoRSS)
3. The Windows client is easily dissuaded from continuing to run.
4. The geocoding is not wildly accurate, especially outside the US.
5. The client doesn't autoupdate.
6. There is no Mac/Linux client.
7. You can't log in with OpenID.
8. There's no API.

The license of this software is Freeware, you can free download and free use this social networking software.