Security
CCleaner – removes old temp files etc
ClamAV – antivirus, but no realtime scanning so it doesn’t stop you opening infected files.
Microsoft AV – I’m testing microsoft security essentials.
Spybot S&D – removes spyware and other crap
Procxp – geek version of taskmanager, shows everything running on a computer
Others
7zip – opens all compressed files eg zip, rar, tar, iso etc
Audacity – sound editor used for recording, production etc. really shouldn’t be free !
Bulk Rename – as the name suggests, very useful when you get used to it
Cutewriter – adds pdf as a printer
IrfanView – image viewer with batch converting abilities
Mp3tag – add artwork to mp3s and bulk edit tags
PSPad – lightweight text / code editor with session restore 
and many useful tools
Gas struts are a type of spring that use compressed gas unlike a typical metal spring. Nitrogen gas is contained in a cylinder and compressed by a piston to exert a force. Because of their durability and wide range of force and damping characteristics they are used in hundreds of applications, most commonly to support car tailgate doors.
Fixed Force Gas Strut with plastic push-fit ball socket end fittings.
If piston with a 1” square surface area is used in a cylinder with an internal pressure of 10 pounds per square inch a 10 pound-force or 44N (Newton) will result.
If there is a large volume of gas there is only a small increase in strength as the piston compresses into the cylinder. A small volume of gas results in a larger strength variation.
The standard gas equation is used to calculate the difference. Pressure x volume / temperature (must be kelvins or degrees Rankine) = pressure x volume / temperature.
Oil present inside the cylinder and a fine hole running through the piston dampen the piston motion.
