Squawk is a library and command line tool for running SQL queries against structured/semi-structured static files. (e.g. Apache logs, csv files, tcpdump output).

Default Programs Editor is a powerful file association utility for Windows.

Some good Windows 7/Vista utilities here

Great web-based code editor.

Effective and free photo recovery software.

How do I bypass the UAC to run "Everything" with administrative privileges on system startup?

Very nice full-screen text editor for Windows.

LTspice IV is a high performance Spice III simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators.