Simple plugin to jump to next/previous (un)commented line in file.
nmap <C-j> <Plug>(NextUncommented)
nmap <C-k> <Plug>(PrevUncommented)
nmap <C-S-j> <Plug>(NextCommented)
nmap <C-S-k> <Plug>(PrevCommented)
or in spirit of unimpaired.vim
nmap ]c <Plug>(NextUncommented)
nmap [c <Plug>(PrevUncommented)
nmap ]C <Plug>(NextCommented)
nmap [C <Plug>(PrevCommented)