Mudlet is the recommended mud client for the World of Pain. We provide a 
graphical user interface with character statistics, an equipment and inventory tab, 
tabbed chat channels, and mapping of many zones. All player hometowns have 
complete maps and other zones that are not mapped will auto-map in Mudlet 
when you explore them.

From the Mudlet web site (www.mudlet.org):
Mudlet is a platform for gaming and enhancing game-play primarily with MUDs.
Mudlet provides a toolkit and supports a wide variety of protocols for players and 
creators to tailor an immersive game-playing experience. MUD creators can use 
Mudlet to add visual flair or build features into their text games. MUD players can 
utilize the Mudlet toolkit to script and automate parts of their gameplay or add 
their own visual customization for game data.

Using a high-resolution screen on Windows and having display issues?
See https://wiki.mudlet.org/w/FAQ#Distorted_font_on_Windows.3F