- ReSharper (30 days trial is free) – Super useful code assistant/navigator.
- NCrunch (free while in beta) – Continuous build and test/coverage tool.
- C# outline – Allow collapsing of statements like if, for, etc.
- Spell Checker – for comments and strings.
- T4 Editor – T4 text templates syntax highlighting and intellisense.
- VSColorOutput – Highlights errors in build output.
- WebEssentials - For Markdown support.