It is against regulations as well as being a violation of ICQ terms of usage, but AOL’s OSCAR protocol for networks is used by third party clients. These third party clients have created their own protocol that is similar but is often reverse engineering as well as different protocol descriptions.
The companies that are using this type of network protocol include:
- Ayttm supports MSN, AIM, Yahoo, XMPP, and IRC
- Adium supports XMPP, MSN, AI, Yahoo, ICQ and various ones for Mac OS X
- Bitlbee is an IRC gateway that supports XMPP, MSN, AIM, ICQ, Yahoo along with Google Talk.
- Climm also known as mICQ is only text based and offers no other options or features
- Centericq supports XMPP, MSN, Yahoo, IRC, AIM, and ICQ but once again this program does not offer any features besides being text based.
- eBuddy is a bit different as it is only web based but does support MySpace Chat, ICQ, AIM, Yahoo, Google Talk, and MSN
- Fire supports XMPP, IRC, MSN, AIM, Yahoo, ICQ, and other systems for Mac OS X
- Jimm only supports the ICQ system specifically for Java Me cell phone gadgets
- Kopete may offer more options as it supports Novell GroupWise Messengers, IRC, Gadu-Gadu, Google Talk, Yahoo, XMPP, ICQ, MSN, and AIM. It also supports this program for any Unix like systems
- Meetro not only offers instant messaging but also social networking that includes location. This system supports Yahoo, ICQ, AIM, and MSN.
- Meebo is different as it is based on Ajax and supports XMPP, MSN, ICQ, Yahoo, AIM, and Google Talk.
- Miranda IM only supports the system for Windows and supports mainly BNet, Gadu-Gadu, Google Talk, IRC, XMPP, AIM, ICQ, IRC, and Yahoo to name a few.
- Pidgin once known as Gaim is different as it supports a wide array of programs including IBM Lotus Sametime, ICQ, SILC, Yahoo, Gadu-Gadu, AIM, XMPP, Google Talk, IRC, and MSN among several others.