Store multiple things on Clipboard: Win + V

Various Windows keyboard shortcuts: Win+#, Win+R, Win+Shift+S, Win+E

Annotate and edit several screenshots at once: ShareX

“Better search” with Regex

Rainbow CSV plugin to view .csv, .tsv, any character-separated list

Fast PDF viewer: SumatraPDF

3GPP decoder (made obsolete by KS Notepad++ plugin)

uBlock Origin: element zapper