(There's no video for AOL Instant Messenger 2.x (68K) yet. Please contribute to MR and add a video now!)
AOL Instant Messenger was a popular chat client which let you connect to the AOL network, AIM, ICQ and iChat all at once. This is an older version but the last one to be 68K compatible.
See also: AOL Instant Messenger 4.7
InstallAIM_2.0.531.sit (2.31 MiB / 2.42 MB)
AIM v2.0.531 installer / compressed w/ Stuffit
AIM_installer_2.01.617.sit (2.42 MiB / 2.54 MB)
AIM installer v2.01.617 installer (1999) / compressed w/ Stuffit
Emulating this? It should run fine under: SheepShaver