Zeal is a great app with documentation for developers! They already have portable version
https://zealdocs.org/download.html
You are here
Zeal
February 19, 2017 - 10:51am
#1
Zeal
New: KiCad (Mar 25, 2025), Platform 30.0.2 (Mar 27, 2025)
1,100+ portable packages, 1.1 billion downloads
Ad Free! Please donate today
Zeal is a great app with documentation for developers! They already have portable version
https://zealdocs.org/download.html