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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You don't even need a second keyboard, you can just type it and have it be converted like this. (Made by me, no installation of AHK necessary)
My personal favorite is fetlang.
You can do that with a lot of languages. In C you can use macros to the point where most of your code is in emojis.
There's a handy Vim plug-in for Julia that will convert latex commands to symbols so it's a one character difference for a pretty notable improvement to readability when you start to get into longer equations.
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Hence, a higher number means a more popular project.