Miranda Instant Messenger

Miranda IM is a multi protocol instant messenger client.No bloat, it's Easy and Small! Miranda IM is designed to be resource efficient and easy to use. It uses very little memory and requires no installation. Just unzip and run! This also makes it ideal for users that want to run their messenger client from a removable storage such as an USB memory stick. It can even be stored on a floppy disc if not too many plugins are used