Version 0.4.6 of package Popper has just been released in GNU ELPA. You can now find it in M-x list-packages RET.
Popper describes itself as: ==================================== Summon and dismiss buffers as popups ==================================== More at https://elpa.gnu.org/packages/popper.html ## Summary: ━━━━━━━━━━━ POPPER.EL ━━━━━━━━━━━ [file:https://melpa.org/packages/popper-badge.svg] • /New in v0.45: popper-echo-mode for displaying popup names in the echo area and dispatching on them/ • /New in v0.40: Auto-hide or suppress popup buffers, assign popups by predicate/ Popper is a minor-mode to tame the flood of ephemeral windows Emacs produces, while still keeping them within arm's reach. ## Recent NEWS: [Not available 🙁]