CAKE (Key Addressed Crypto Encapsulation) is a bunch of Python and C++ for implementing the CAKE protocol. The CAKE protocol is a protocol in which all messages have source and destination addresses that are public keys. This is in the same way that IP packets have a source and destination address that is an IP address.
The ipoque PRX traffic manager effectively detects and controls all major peer-to-peer (P2P) filesharing, instant messaging (IM), and Voice over IP (VoIP) protocols. Bandwidth and volume limits can be assigned to network links, subnets, individual users, and user groups. Detailed usage statistics are provided and can be exported for post-processing. This community edition is a fully functional version with a bandwidth limit of 2 Mbit/s.
Off-the-Record (OTR) Messaging is a gaim plugin which allows you to have private conversations over the instant messaging system of your choice. It provides encryption, which prevents someone who intercepts your instant messages from reading them; authentication, which ensures that the correspondent is who you think it is; and perfect forward secrecy, which ensures that no previous conversation is compromised if you lose control of your private keys.
Akeni Instant Messaging Server Pro is a client/server instant messaging platform that allows companies to host their own secured private IM system. The client has an user interface similar to AIM, ICQ, or MSN Messenger. It supports all the standard IM features such as chat, group conference, presence management, file transfer, offline messages, and emergency alert/notification. Extra features include contact management and optional tabbed chat sessions. The server has advanced administration tools for managing user accounts, client-side logging capabilities, and peer-to-peer file transfers. It can be set up on a private network without connecting to the Internet, and can easily be set up for use inside and outside of the company firewall.
Effusia Business Messenger is a cross-platform, centrally managed, internal instant messaging and presence communication tool for small to medium enterprises. The system comprises a client, a server, and an integrated Web based administration tool. Effusia focuses on providing real-time business communication combined with simple deployment, easy administration, and a friendly end-user experience.
IMLogger provides a usable program to enable network administrators to log certain instant messaging activities (namely, login and logout). AOL is currently supported, with Yahoo, MSN, and Jabber protocols in the works. This is very useful in Universities where campus police want to trace a SN back to a port/dorm room.