Programming resource

Code Converter
The best C# to VB translation service that I've used.
Visual Studio
Color Hexa
The only color index library I use.
Application, Website
Paper Sizes
Vital information when creating printouts.
Application
RegExLib
Sometimes you're better off writing your own pattern, but this can speed things up.
https://en.wikipedia.org/wiki/Regex
Response Viewer
If you ever need header information about a URI, this is a life saver.
https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
Time and Date
I use this most as a point of reference for time zones.