SwiftKit

SwiftSwitch (often shortened to SS) is a world switching program released by Jason Fah. The program has many extra features, including access to quick guides including quest, area, and treasure trails guides, a built-in IRC client, instant hiscore lookup table, and other tools including timers and counters.

Legality
There is much controversy as to whether SwiftSwitch is a legal program or not. Before, they had blocked the ads for F2Players, and this is against the rules. In the newer version, ads were put in, making it legal for Free players.