Below is a list of unofficial additions or modifications to the MSN Messenger protocol. Nothing here is officially supported by Microsoft.
If you have created an unofficial addition to the protocol, please submit it to us. However, we do not currently have a nice system setup for submitting entries. Please contact us with a name, URL, and brief description of your entry.
Proposals and current implementations for encrypted messaging over MSN Messenger.
A message type designed to identify and negotiate features and information between third party clients.