Modification of Desert Rose 2 code which is based off Fallout 13 and too many sources to list which is also based off too many sources to list. Credit goes to both of them and the armies of unnamed Coders who's backs this was built off of.
All code after commit 333c566b88108de218d882840e61928a9b759d8f on 2014/31/12 at 4:38 PM PST is licensed under GNU AGPL v3.
All code before commit 333c566b88108de218d882840e61928a9b759d8f on 2014/31/12 at 4:38 PM PST is licensed under GNU GPL v3. (Including tools unless their readme specifies otherwise.)
See LICENSE and GPLv3.txt for more details.
The TGS3 API is licensed as a subproject under the MIT license.
See the footers of code/__DEFINES/server_tools.dm, code/modules/server_tools/st_commands.dm, and code/modules/server_tools/st_inteface.dm for the MIT license.
tgui clientside is licensed as a subproject under the MIT license. Font Awesome font files, used by tgui, are licensed under the SIL Open Font License v1.1 tgui assets are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
All assets including icons and sound are under a Creative Commons 3.0 BY-SA license unless otherwise indicated.