For anyone that is a TextPad fan but has been too lazy to add syntax highlighting/compiling for C# take the time and add it in. See Sam's post. I like TextPad for quickly viewing source files.
I have really enjoyed Scott Mitchell's recent writings (especially his data structure series and Going Independent). A good data structures article is great because there is always something new you can pick up. The 'Going Independent' write up just gets me thinking about my career. More on that later...