What's the most useful utility app that you would recommend?

Question

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Which freeware apps / utilities do you use to boost your productivity?

This could be something like a Snippet Compiler, or the .NET Reflector or even an application that tells you what time you have to leave to catch the bus?

Answer 1

Google Calendar. Without it I would miss everything.

Answer 2

TortoiseSVN

I just can't live without it anymore. On that same thread, the Subclipse plugin for Eclipse is nice.

Answer 3

JetBrains Resharper

Answer 4

Git. Speaks for itself.

Answer 5

Jetbrains Resharper, DotCover, and DotTrace