A plugin manager compatible version of Damian Conway's listtrans plugin
nmap <SOMEKEY> :call ListTrans_toggle_format()<CR>
vmap <SOMEKEY> :call ListTrans_toggle_format('visual')<CR>
For example:
nmap ;l :call ListTrans_toggle_format()<CR>
vmap ;l :call ListTrans_toggle_format('visual')<CR>