Mercury is a Java MSN Messenger client. Mercury is a fun and easy-to-use instant messaging application.

Mercury Features:
1. Sign in with multiple accounts
2. Fast file transfering
3. Simultaneous sending & receiving webcam
4. Offline messaging
5. Extensive event notifications
6. User defined event actions
7. Smart groups (groups made from a search result)
8. Single window (tabbed) conversations
9. Customizable contact list
10. Customizable message views
11. Custom status icons
12. Custom emoticons
13. Resource saving (Webcam streams, Display pictures, Emoticons)
14. HTTP Proxy
15. Yahoo contacts
16. Audio/Video conference (Windows & Linux only atm)
17. Multiple Points of Presence
18. Voice Clips
19. Multi OS
20. Runs from USB stick
21. Language support

This same method of running Mercury can be used for testing purposes or if you simply wish to have different Mercury installations, each with their own settings folder. The settings folder will still be saved in the program folder, but the program folder doesn't have to be on a USB stick. It can be anywhere on your hard drive. To do this, you can follow the instructions below, substituting the USB stick with the location you wish your program folder to be installed to.

Requirements:
* Java Runtime

The license of this software is Freeware, you can free download and free use this instant messenger software.