Free and Open Source Softwares

Tera Term: https://ttssh2.osdn.jp/index.html.en

Notepad++: https://notepad-plus-plus.org/

HEX-Editor:

HxD: https://mh-nexus.de/en/hxd/

Frhed: http://frhed.sourceforge.net/en/

DiagramDesigner: http://meesoft.logicnet.dk/DiagramDesigner/

GIMP

Inkscape

WinMerge: http://winmerge.org/

Putty: https://www.putty.org/

KeePass: https://keepass.info/

XMind: Mind Map

7-zip

tightVNC

Audacity

PDFCreator

Clonezilla

GunCash

wxMaxima