Computers & Computing

AnalogX Tools has fine tools for specific purposes impossible to outline here.

ISS Satan Tools is where you can learn more about your network’s security.

Total Commander is hands down the best file/ftp manager on earth for
Android, Pocket PC, Windows/CE, etc.

IrfanView is probably the best free viewer on earth.

GRC Network Safety Tool lets you test your computer/network safety.

Test your Internet Speed at Speed Test or Bandwidth Meter.

To block pop-up windows, ads, nuisances, etc you can use e.g.
AdBlockPlus
AdMuncher
NoScript

A good free firewall can be found via thorough reviews e.g.
here and here and here ;)

Excellent Anti-Virus Scanners are e.g. aVast, AVG, ESET, and AntiVir.

Read, and the force will be with you: www.speedguide.net

One of the fastest, tiniest, portable and free PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader is SumatraPDF.

A little Web Browser overview: Mozilla, NetScape, Opera, IE, FireFox, Chrome…
www.browserchoice.eu

Internet Browser Test
http://acid3.acidtests.org/