pacli with a lot of help from pekman (he started it), Chrysostomus, and papajoker.
the development of pacli has stopped a while ago, though.
since then, i concentrated on pacli-simple (papajoker has continued to contribute valuable tips there). i am using pacli-simple almost every day and sometimes i have ideas for improvements.
in pacli-simple, i am especially proud of the "fix pacman errors" function, which fixes all regularly emerging pacman problems i have read about in this (and the old) forum. recently, i have added automatic removal of old log files to the "clean system" function. i have also added a brand new "configure system" function, which lets you edit about 30 important config files (because i could never remember their paths when i needed to edit them).
while these are almost full-blown CLI package managers, they are technically still bash scripts.