Calculating resonance of tonearm and cartridge. This is a commonly discussed topic at Audiogon and I found this site where you can calculate this simply and quickly.
Free computer security software. Even if you dont use a Bit Torrent client to share files, PeerGuardian effectively blocks advances from advertisers, spam, Java application stubs and spyware.
Windows download is prominent and there is a Navigation bar on the right that provides links for Linux, and Mac OS X downloads.
My son runs this on Microsoft XP Pro and I have it on two Macintosh's running OS X. It's amazing the number of hits this turns away from my computer.
Listening room dimensions are often out of our control, but the Cardas Golden Cuboid dimensions have shown up in some of the best sounding listening rooms I've been in. Here's a link to the Cardas room ratios and other room setup suggestions...
Cardas Golden Cuboid Room Dimensions and other room setup suggestions
Look up any music, any artist, any song ever recorded. Many albums have the option to listen to part of each track.
A valuable tool if you're bidding on software at Audiogon or Ebay and can't remember what songs are on the album. You can also search by song title and see every person who has recorded it.
I use this EVERY day.
Wish you had a spell checker for Audiogon forums?
Below is a link to a spelling application that corrects as you type or will look into ANY text that you have on your desktop. Not only documents, but web pages, forum posts, email, Microsoft files, text in Photoshop, i Tunes to name a few.
Works in many languages and even has technical library with scientific terms. Words that only exist (such as brand names in high end audio) can be added and will be check automatically, every time you type.
Cool tool for placing loudspeakers in your room:
With this program you can "move" your speakers around the room, add and subtract drapes and furniture and see the effect.
Turntable and tonearm user manuals and technical documents for many brands/models have been collected at The Vinyl Engine, a great source of information for turntable users.
Library of user manuals and technical documents at The Vinyl Engine, also includes downloadable strobe discs and alignment protractors.
It's quite possible your favorite high end audio gear got it's good looks here.
For every high end audio chassis you recognize, this company supplied a hundred more not shown on their site.