Features

Hmmm.. listing the KVIrc features ?
Well... why not ?
Here are some key-phrases that came in my mind.

User interface
- Full GUI Based configuration
- MDI floatable windows
- Built-in help browser
- Themes support (all configurable by GUI or scripting)
- Pseudo-transparency support (up to the desktop on KDE)
- Drag & Drop toolbar editing
- Activity Notifier Pop-Up
- Status bar with Applet support
- Unread text mark
- 14 Languages Translations
Network
- Proxy support (SOCKSv4, SOCKSv5, HTTP)
- Full IPv6 support (also for DCC transfers)
- SSL support (also over IPv6)
- Micryption support
Core
- Modular architecture: unfrequently used features reside in external modules and are loaded only when necessary
- Extensibility: a huge API for writing extension modules
- UNICODE support
IRC
- Multiserver connection
- Notify lists (yes, WATCH is supported)
- Ignore lists
- Registered users database
- Lag meter
- Configurable logging
- Standard DCC CHAT and SEND (with resume) support
- Extended DCC types: VOICE, RSEND, GET, RECV
- DCC CHAT over SSL
- DCC bandwidth limit (ability to set it "on the fly")
Scripting
- Built-in scripting language interpreter
  - scalars, arrays and hashes...
  - aliases
  - popups
  - events
  - scriptable toolbars
  - Perl support
  - Ability to translate scripts (by the means of the tr() function)
  - ...
- Objects support in scripting language: yes, now you can do OOP
- ...