ICQ now is the established leader among instant messengers. However, while lots of people use it every day, some of them are not particularly happy about its performance. For some it's too slow and has too many bugs, others hate the ads, etc. What's the solution if you want to keep in touch with your ICQ mates but hate the original ICQ client? Use an alternative - Simple Instant Messenger.
     Simple Instant Messenger is an open source ICQ client that works on a variety of platforms, including all versions of Windows. It supports most of the ICQ 2001 features, among which are non-ICQ contacts, SMS support, chat, file transfers, multiple UIN support, multiple language interface, message history, customizable toolbars and more. It also supports secure direct connection with other SIM and Licq clients, as well as Miranda icon themes.
     There are a few perks like sending and receiving images in RTF format and more. The installation file requires one to be online and download two more files during the installation process.