Very fast macOS extension for coloring code, supports every (60+) uti types. Might be the fastest implementation, and different because 100% Swift: no rtf nor html.

Notepad++ (UDL 2) User Defined Language color syntax for SAS language

Dracula theme for the Dyalog APL Windows IDE and Dyalog APL Remote IDE

SublimeText syntax mode for BBC BASIC files

SublimeText syntax mode for RISC OS CMHG files

The cool source code syntax color scheme for IntelliJ