...some companies, websites, I like and can recommend...
What I especially like about these companies is that they have a passion and care for what they do, produce really great products, and are in general very value priced in a world where audio products can be very pricey...
I like how these companies envision a product, persist in making it real and then spread it around the world, touching and enhancing each of our lives on a daily basis...
Decware Audio
Tube amps, pre-amps, high efficiency speakers...
The Hornshoppe
Single driver horns, bass augmenter... A smaller footprint speaker...
Mapleshade Audio
Solid air dried maple, vibration reducing audio racks, footings... I use and especially like their Samson audio racks...
KingRex
Solid state pre-amps, small t-amps. I highly recommend their small pre-amps, very clean sound... I use them to boost and control the signal coming off a couple of my phono amps.
AntiCables
Solid copper speaker wires, very transparent... Other interconnects and speaker wires I use are from Decware and MAC (My Audio Cables -- though I no longer see them listed on the web).
diyParadise
If you are more DIY inclined. I've tinkered with the Monica USB DAC coupled with a Decware zkit 4 tube output buffer...when I was trying out and experimenting with DACs...
Eastern Electronics Audio
DACs
Graham Slee
Phono Preamps
DIY HiFi Supply
Turntable parts
Foobar2000
PC audio player/ server software...
Computer Audiophile
Informative forum on using computers as a part of your audio system...
The Well-Tempered Computer
A website devoted entirely to computer audio...
Liliputing
Reviews new small form factor PCs.