Social Source Commons

A multi-protocol Instant Messaging (IM) client

OTR allows you to have private (not just encrypted) conversations over instant messaging by providing: Encryption, Authentication, Deniability, and Perfect forward secrecy.

Messaging, collaboration, workflow automation and application server.

Messaging and collaboration server software.

Google Talk enables you to call or send instant messages to your friends for free, anytime, anywhere in the world.

iChat is an instant messaging application

Trillian™ is a fully featured, stand-alone, skinnable chat client that supports AIM, ICQ, MSN, Yahoo Messenger, and IRC.

Open, secure, ad-free alternative to consumer IM services like AIM, ICQ, MSN, and Yahoo (see the IM quickstart).

Cross-platform, multi-protocol, IM and presence awareness aggregator.

Imvite lets you chat with all your contacts from Yahoo Messenger, Windows Live Messenger, AIM and ICQ. It allows you to make free video and worldwide PC to PC calls, read news via RSS and also to watch multiple TV channels at the same time.

Operating via a network, Groove Virtual Office software allows teams of people to work together as if they were in the same physical location, through their website.

Messaging service to multiple devices (email, RSS, text messaging, etc.).

Share your files privately and securely. Chat with your friends. Firefox addon.

Instant Messenger client for Jabber

Allows organizations to distribute messages to interested parties via whatever channel (IM, email, SMS, etc.) each individual has setup as their preferred method.

Tool that combines Skype with MySpace.

Email, online storage and communication software with a strong emphasis on security and encryption.

Instant-messaging program

Apache ActiveMQ is the most popular and powerful open source Enterprise Messaging and Integration Patterns provider.

Apache ActiveMQ is fast, supports many Cross Language Clients and Protocols, comes with easy to use Enterprise Integration Patterns and many advanced features while fully supporting JMS 1.1 and J2EE 1.4

JomSocial enables social networking on Joomla! sites. Features include activity streams, flexible templating & design, photo gallery, video support, organic groups, event management, social graph management, customize profile, private messaging, and external social network integration.

ChatSecure (Gibberbot) is a secure chat client capable of firewall and filter circumvention, surveillance blocking and end-to-end encryption. It works with Google, Facebook, any Jabber or XMPP server, such as OpenFire or eJabberD. Unlike Blackberry BBM’s broken single key security, Gibberbot uses the Off-the-Record encryption standard to enable true verifiable end-to-end encrypted communications.

Free unlimited, private, secure messaging with your friends over Facebook Chat, Google Talk, Hangouts, Jabber, Dukgo & more! Works with Android, iPhone, Mac, Linux or PC.

Mobile social networks that works with any mobile phone or device. Members can join instantly with one text and exchange group messages, polls, reminders, and web alerts.