Messenger Plus! Live is an add-on for Windows Live Messenger that lets you add features and extras to the IM software. With Messenger Plus! Live, you can download new skins, emoticons, scripts, or even options that let you log and search your chats. The service, which currently boasts 27 million users, offers so many features, that regular IM users will want to at least check it out. (Watch out when installing though - you may want to uncheck the "sponsor" program it wants to install).
Here are a handful of things that I found that make Messenger Plus! Live worth a look:
1. This Snazzy Vista skin makes Windows Live Messenger even more sleek and shiny.
2. Reminder+ is an add-on script that helps you remember scheduled tasks.
3. Messenger Plus! Live Enhancer features things like contact list docking, auto-hide contact list, disable flashing of windows & taskbar button, and more.
4. Screenshot Sender lets you easily send screenshots to your contacts.
5. CountDown in Personal Message adds a counter (up or down) to your personal message or nickname.
You can download Messenger Plus! Live for free from here.