Jeden cheat sheet do ~wszystkiego
Has a simple curl/browser/editor interface.
Covers 56 programming languages, several DBMSes, and more than 1000 most important UNIX/Linux commands.
Provides access to the best community driven cheat sheets repositories in the world, on par with StackOverflow.
Available everywhere, no installation needed, but can be installed for offline usage.
Ultrafast, returns answers within 100 ms, as a rule.
Has a convenient command line client, cht.sh, that is very advantageous and helpful, though not mandatory.
Can be used directly from code editors, without opening a browser and not switching your mental context.
Supports a special stealth mode where it can be used fully invisibly without ever touching a key and making sounds.
Fajne to :)