Power Supply Units

About.com
Article discussing things to look for when choosing a power supply including power output, form factor and noise level.
http://compreviews.about.com/od/cases/bb/PSU.htm

Akasa Thermal Solutions
Manufacturer of low noise desktop power supplies between 400 and 1000 watts. Also make cases, cooling solutions and modding kits.
http://www.akasa.com.tw/

Antec, Inc
Manufacturer of desktop and server power supplies, including silent fanless models. Also make cases, rackmount enclosures and CPU cooling fans.
http://www.antec.com/

Enermax Technology Corporation
Manufacturer of desktop and server PSUs. Includes technical specifications. [Flash intro]
http://www.enermax.com.tw/

Enhance Electronics
Manufacturer of desktop, server and rackmount power supplies of between 250 and 650 watts.
http://www.enhanceusa.com/

Helly Science & Technology Co., Ltd
Manufacturers of M-box range of switching power supplies and computer cases. Based in Guangzhou, China.
http://www.helly.com.cn

Hiper Group
Manufacturer of desktop power supplies between 350 and 730 watts. Includes links to product reviews. Also make LCD screens, dvd players and cathode light tubes for PC cases.
http://www.hipergroup.com/

Nexus Technology bv
Manufacturer of low noise desktop power supplies between 300 and 600 watts. Also make CPU cooling and case fans.
http://www.nexustek.nl/

N2Power
Manufacturer of ultra small form factor power supplies for network hardware.
http://www.n2power.com/

Sea Sonic Electronics Co., Ltd
Manufacturer of desktop and server power supplies, including silent fan control versions. Includes technical information and a support FAQ.
http://www.seasonic.com/

Tagan Technology Co, Ltd
Manufacturer of low noise PC power supplies of between 330 and 1300 watts. Includes technical specifications. [Flash intro sequence.]
http://www.tagan.com/

Thermaltake Technology Co, Ltd
Manufacturer of desktop and server power supplies, including adjustable fan speed and fanless silent models. Vary between 300 and 1200 watts. Also offer cases and cooling products.
http://www.thermaltake.com/

Zalman Tech Co, Ltd
Manufacturer of low noise desktop power supplies of 300 and 850 watts. Also make system cooling and computer audio products.
http://www.zalman.co.kr/