Programmers learns various languages and write programs, but as we all are humans there are times when we forget a function, or just need to reference a function or API properties or just view how to properly use that property. Because of that we go the Documentation page of the Programming Language, in that process we lose precious time by Opening a Browser, then doing a Google Search and viewing the Documentation page.
But what happens when you are offline and you cannot access the internet, then How do you view Documentation page for that Purpose there is Dash the offline Documentation browser.
Dash is an offline Documentation browser, that allows you to download and view over 150 documentation sets of various programming languages.
Because of it I can view documentation offline whenever I need to quickly reference or check a function and all it takes is just 2 seconds because of Dash's powerful search that instantly displays the search results.
Dash also integrates with other softwares that makes using Dash with your already existing softwares extremely easy, such as Sublime Text, Alfred, Coda, Xcode, Brackets and Many More. you can also use Dash API in your own custom software you created.
Free version of Dash sometime has a waiting time of 8 seconds before viewing the documentation page, but that is a small tradeoff for the powerful features it gives, so if you like and want to, you can even buy the premium version.
but the premium version and free version do not have any difference except the waiting time, so it is completely upto you to support the developer for creating such a wonderful software.
Alternative to Dash for Windows and Linux
I have been using Dash for almost 6 months but as you already know Dash is Mac and iOS exclusively only. but there is another Offline Documentation browser for Windows and Linux that has been Inspired by Dash.
Zeal is an Open Source offline Documentation browser that has almost similar features of Dash and also supports Dash Docsets. Zeal works with both Windows and Linux, So non Apple users don't have anything to worry about