Zeal is a great tool for browsing documentation without the need for an internet connection.
I love how fast it feels to browse the documentation, instead of wasting seconds after seconds waiting for some overloaded website to load.
I think the unfree MacOS tool Dash was there before, they also provide the docsets.
Zeal reminds me of the good old .chm file format: Microsoft Compiled HTML Help
How to search
- string will search all docsets for string
- python:string will search only docsets related to Python for string
See more useful tips here: https://zealdocs.org/usage.html
My favorite docsets
- Java EE8
- Java SE14
- Python 3
- Spring Framework