Not outside of Reaper but if you're adventurous, you could do a custom toolbar! For years I had toolbars with my most used vst's.
Then I used a more advanced toolbar script for a while:
https://forum.cockos.com/showthread.php?t=231684
And now I have everything on a separate ipad with a custom web interface.
All those could have images or names that help to define what the plugin does.