Amazing tools that make your testing smarter faster easier
Texter - Writing test cases or defects , Text substitution app Texter saves you countless keystrokes by replacing abbreviations with commonly used phrases you define
Jing / substituted with snipping tool now in Windows 7 - Capture Screenshots
Bubbl - Mind mapping tool , great for brainstorming / idea / sharing information
FreeMind - again a brain storming tool but has better features for a detailed ideaation
EtherPad / typewith.me - is an online document collaboration tool which works in real time. In other words, EtherPad has allowed multiple people to work on the same document at the same time over the Internet
Rapid Reporter - Session based testing / Exploratory testing
PerlClip - generate text , text count and more
Log-Watch - creates a log file as it goes, reporting strange events and possibly errors that might not appear through the UI
Color Cop - returns RGB values
WebWait - check the speed of your web application
METS - Minimal Essential Test Strategy (METS) - These are Excel spreadsheets but help in planning and estimating tests
Beyond Compare - Comparison tool
Test Data Generation(http://www.generatedata.com) - This is a really cool web script that you can use for free and even download the script for use on your own server.
Dia (Visio alternative, helpful for drawing process flow diagrams, etc for test planning) - http://live.gnome.org/Dia
Sikuli - Sikuli is a visual technology to automate and test graphical user interfaces (GUI) using images (screenshots) - http://sikuli.org/
IcuTest - GUI Unit Testing for WPF - http://www.nxs-7.com/icu
Paloma Print Perfect - STREAMDiff - Comparison of PDF docs - https://www.palomaprintproducts.com/STREAMdiff/printPerfect.asp
LucidChart which is another Visio alternative which is web-based. It has real-time collaboration so lots of people can work simultaneously.
Feel free to add more tools that make your testing Smarter!