YaP! is a Scripts software developed by Padavid. After our trial and test, the software is proved to be official, secure and free. Here is the official description for YaP!:

YAP ! is an IRC Client Written in C#.

What's new in this package
Performance Improvement
Memory consumption reduced
A brand new Aliases editor
RFC 2812 Improvement
New Icons
UI Fixes
a lot of bugfixes