While wandering around /r/Google, I've learned about a lot of things you can get on Google by typing special queries, apart from the basic calculator you get when typing a math query, or the graph screen when typing something that contains a variable name, there are for example the color converter, the currency converter, calculating the side of a square or even comparing emus and ostriches.
Is there a list of all of those "mini-apps" or commands that you can use on Google?
Best Answer
The official documentation of type of search results available using Google Search is available here.
It includes:
Google also displays mini embedded versions of other Google products and services within their web search for ease of use. This includes but is not limited to Google Flights, Google Maps, Youtube, Google Translate etc. (For a full list see, this) Where the web search incorporate results if the search was typed into another one of their other services: Examples include:
Finally there is a list of OK, Google commands which work on the Google App on mobile devices:
The basics
Search
Navigation
Entertainment
Random tips and tricks
Control phone and adjust settings
Travel
Most of these commands will also work on Google Search, but you may need to sign in to your Google Account. Some of these commands work exclusively on mobile such as "Send a text" or "Post a tweet" because on a desktop Google cannot access these third party applications. This obviously also applies to things like "Take a selfie", or other exclusively phone like features.