common use tools shipped as application

structured editor:
texmacs, http://www.texmacs.org/tmweb/home/welcome.en.html

text editor:
notepad++
notepad2
sublime text
lime text

modelling:
staruml
staruml2 beta

screen capture:
setuna2
jing

code coverage:
opencover

decompile .net assembly:
ilspy

command prompt:
conemu

tools collection:
systeminternals
nirsoft
softwareok

protocol analysis:
wireshark
fiddler
port peeker

remote desktop manager:
multidesk

calculator:
bincalc

bootable usb disk maker:
rufus

geometry drawing:
http://www.geogebra.org/cms/en/