I first used full geany-plugins package, however, contains lots of other plugins as well, so is relatively large at around 7MB download. However, you can delete all the ones you don't want (in my case on WDL_Arch64 from /usr/lib/geany). The other equally small geany plugins I use are Line Operations and Split-Window (from Tools menu) - the File Browser plugin can be useful too (though more powerful Treebrowser from the geany-plugins package seems to freeze now and then on my system.