https://www.privacytools.io - useful info about privacy but most info is garbage

https://www.mindmaps.app

https://shortcutworld.com/ - save your time with hotkeys

https://translate.google.ru

Uploading files:

Use googledisk/clour mail or etc with passworded archives + minimal compression. 7z.

https://sdi-tool.org - drivers

https://z-oleg.com/secur/avz/download.php

https://www.ghisler.com  - Total Commander

https://www.altap.cz/salamander - free alternative like TC

http://www.explorerxp.com  - for those who can't handle TC

https://lockhunter.com - unlock files which don't want to be deleted

https://stefansundin.github.io/superf4 - save your time by pwning annoying non-closing apps. 

https://constexpr.org/innoextract  - extract files from setups + https://github.com/d4k0/UniExtract2 

PDF:

https://www.sumatrapdfreader.org - fast, comfortable PDF reader 

https://rst2pdf.org

http://pdfedit.cz

https://pdfsam.org/pdfsam-basic

LibreOffice

Alreader

https://notepad-plus-plus.org + https://sourceforge.net/projects/nppgtags

https://www.xnview.com - multiconverting/renaming/etc images tool (CTRL+U for multi converting)

https://www.getpaint.net - comfortable fast pics editor

https://www.gimp.org

http://blog.bahraniapps.com/gifcam - not only good for recording from desktop, but also editing gifs (also vclip there for saving webm)

https://www.ocenaudio.com

https://mpv.io

https://obsproject.com

https://kdenlive.org - best free video editor

http://www.foobar2000.org Great minimalistic audioplayer

https://www.blender.org

https://clover.moe/mm3d - great fork of misfit3D from ZTM

https://richwhitehouse.com/index.php?content=inc_projects.php&showproject=91  - 3D models converter

https://stefansundin.github.io/altdrag

https://www.henrypp.org/product/memreduct

http://dege.freeweb.hu/dgVoodoo2

https://www.rapidee.com - windows Path editor

https://www.sharemouse.com - for those who has many monitors

Portable applications without installers:

 https://portableapps.com

https://www.liberkey.com

https://www.ugmfree.it

http://www.boxedwine.org

https://github.com/sandboxie-dev/Sandboxie

DXWrapper

Cheat Engine 

https://aggie.io - drawing pics online with others

https://drawpile.net - drawing pics online but it's soft

www.flickgame.org - draw a quest game and export as html

https://www.nvidia.com/ru-ru/geforce/community/demos  - nvidia tech demos, frog demo is fun

https://www.softwareok.com/?seite=Microsoft/12-Ants  - yes, you need this when you are bored

https://my-soft.ucoz.ru/godgame.html 

https://www.msys2.org

http://www.smorgasbordet.com/pellesc

https://www.madwizard.org/programming/tutorials

https://www.learn-c.org

http://www.pouet.net

https://dasm-assembler.github.io

https://onlinedisassembler.com

https://github.com/uxmal/reko

https://openmpt.org

modarchive.org

HTML5bytebeat

Brave Browser

https://privazer.com

http://zerotier.com

QBitTorrent

https://www.netsetman.com/en/freeware

Youtube-DL fork

https://github.com/crazy-max/WindowsSpyBlocker