Version 1.0 of package Marginalia has just been released in GNU ELPA. You can now find it in M-x list-packages RET.
Marginalia describes itself as: ==================================================== Enrich existing commands with completion annotations ==================================================== More at https://elpa.gnu.org/packages/marginalia.html ## Summary: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ MARGINALIA.EL - MARGINALIA IN THE MINIBUFFER ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ This package provides `marginalia-mode' which adds marginalia to the minibuffer completions. [Marginalia] are marks or annotations placed at the margin of the page of a book or in this case helpful colorful annotations placed at the margin of the minibuffer for your completion candidates. Marginalia can only add annotations to the completion candidates. It cannot modify the appearance of the candidates themselves, which are shown unaltered as supplied by the original command. ## Recent NEWS: [Not available 🙁]