BitlBee [SEP] license
BitlBee
BitlBee is a cross-platform IRC instant messaging gateway, licensed under the terms of the GNU General Public License.
BitlBee communicates with the user via the IRC protocol, providing a gateway to popular chat networks such as AIM and ICQ (via OSCAR), Microsoft Messenger service (via MSNP), Yahoo! (via YMSG) and Google Talk and Facebook Messenger (via MQTT with a plugin) and the microblogging networks Twitter, Identi.ca, and GNU Social. Since version 3.0, BitlBee can be built to
and operated on a user's personal computer, a local server, or accessed on public gateway servers. A user registers with the BitlBee server for future credentials storage. Service protocols are added along with their credentials; following this, the software will display the user's buddy list as normal IRC users in a channel. Conversations can be public, or use the private message facility of IRC.
BitlBee runs on Linux, Unix, BSD, Windows, AmigaOSand Mac OS X. 
The software has been reviewed positively. Vladi