The emoji we know and love are defined by the Unicode standard, which also specifies some ways in which emoji can interact with each other or be modified! This webapp lets you try out different combinations of Unicode code points, and see how they react to each other. A companion to Emoji is Fun! (Apr 2022)
Computers perform subtraction by doing addition, using a cool math technique called the Method of Complements. This webapp visualizes the process, and is applicable in any base, including Hexadecimal, Binary and more. A companion to The Method of Complements (Feb 2022).