• work with various programming environments
• like highlighted syntax in their source code
• need a small tool with simple controls and the capabilities of a mighty code editor
• are looking for a tool that handles plain text
• want to spare time - PSPad offers rich text formating functions
• need tool what offer user extension capabilities
• want to save money and still have the functionality of professional products because PSPad is free for commercial and government purposes too

PSPad supports many different extension modules, which you can download from here.