Have been thinking about starting this discussion for a while with our local user group, but why not start it on the forums!

The question is what other software tools/utilities do you use everyday in your normal workflow?  Mainly looking for the free ones, or that have free versions to start with.

I currently use the following almost daily:

#TASK - Sharp Task - #TASK

This program allows you to batch run macro's in SolidWorks.

Greenshot - http://getgreenshot.org/

Used for screenshots and communicating with others

Bulk Rename Utility - Introduction - Bulk Rename Utility

Used to modify files in windows explorer - mainly for files other than SolidWorks

Ditto - Ditto clipboard manager

Extension to the standard windows clipboard

xmind - XMind: The Most Popular Mind Mapping Software on The Planet.

Mind mapping software

what ones do you use?

EDIT: Ensure there are no competitor links.