Rewritten in Rust

https://zaiste.net/posts/shell-commands-rust/

grex

grex -d 00:12:23:12
^\d\d:\d\d:\d\d:\d\d$

grex is a library as well as a command-line utility that is meant to simplify the often complicated and tedious task of creating regular expressions

bat

Very nice looking cat replacement with syntax coloring and line numbers and pager and vim like search.