I like mani. It's a cli that lets you run any command on all of your projects or a tagged subset of them.

  $ mani exec --all --output table --parallel 'find . -type f | wc -l'
  
   Project            | Output
  --------------------+--------
   example            | 31016
   pinto              | 14444
   dashgrid           | 16527
   template-generator | 42

The custom commands you define also have shell completions. It's like a just command runner, but for all of your projects.

https://github.com/alajmo/mani