Showing Functions in the Status Line
Here is the community edtion of Dr Chip's StlShowFunc Vim plugin:
http://www.drchip.org/astronaut/vim/index.html#STLSHOWFUNC
It's created to accumulate collaboration efforts around the plugin, since it's author, Dr Chip - is not always responsive.
Use whatever Vim plugin manager you want. E.g., for minpac, add this to your vimrc:
call minpac#add('dr-chip-vim-scripts/StlShowFunc')