Away Messages
   Suggestions for away messages to use with instant messaging clients.
   http://www.awaymessages.com/

BuddyStumbler.com
   Web instant messenger which allowed to exchange addresses of AOL, MSN, Yahoo, and Google based on user profile, interest and location.
   http://www.buddystumbler.com/

FreshNamer
   Catalogs of user suggested nicknames for use on all popular instant messaging clients.
   http://www.freshnamer.com/

IM Federation
   A federation of IM networks, committed to an interoperable world. Includes mission statement, news, list of open networks and compatible software, and advocacy information.
   http://imfederation.com/

IM-History
   Service allowing storage of chat history online. Supports most major instant messaging platforms.
   http://www.im-history.com/

IMwrapper
   Service for checking online statuses and creation online indicators for MSN, Yahoo, AIM, and ICQ.
   http://www.imwrapper.com/

Make your own display
   Custom displays pictures service for MSN Messenger, Live Messenger, Skype and Yahoo.
   http://www.makeyourdisplay.com/

MiniMobs
   HTML based instant messaging application allowing text communication between users of social networking sites.
   http://www.minimobs.com/

My Display Image
   Collection of avatars, buddy icons and display images. designed for MSN, AOL, Yahoo and Skype.
   http://www.mydisplayimage.com/

PLAYtXt
   Free J2ME Java mobile instant messenger for cellular phones.
   http://www.rummble.com/displayIMService.do

PresenceWorks
   Tool for integrating instant messaging client capabilities into business software.
   http://www.presenceworks.com/

Raketu
   Web messengers compatible with MSN, Yahoo, ICQ, AOL, Skype and Google.
   http://www.raketu.com/

Speedy Messenger
   Instant Messenger which communicates with all instant messengers such as AIM, ICQ, MSN Messenger and Yahoo.
   http://www.speedymessenger.us/

StarLine Messenger
   Instant Messaging application operating on its own network. Requires registration.
   http://www.starlinemessenger.com/

Status-Messages.com
   A collection of user submitted status messages for instant messaging users.
   http://status-messages.com/

Transplug
   Hosted corporate instant messaging solution. Commercial software.
   http://www.transplug.com/

YMTiny
   Application to enable users of Yahoo Instant Messenger to communicate via their mobile phone.
   http://www.orisinil.com/ymtiny/

eBuddy
   Web messenger which is compatible with a variety of services like AIM, AOL, and MSN.
   http://www.ebuddy.com/

i-msgr
   Instant messaging service provider for groups of friends, communities, or web site visitors.
   http://www.i-msgr.com/

iMessengr.com
   Instant messaging clients, Web based and multi-protocol messengers, addons, plugins and tools.
   http://www.imessengr.com/

weblin
   Community oriented chat software for Windows creates a chatroom on every site opened in a Firefox or IE browser window. Users can talk via animated avatars.
   http://www.weblin.com/