Which LaTeX IDE has Vi plugin?
vim mode, as it uses kate as the editing component. It can be set under
Settings/Editing/Editor/Vi input mode.
It does not support all
vim features, but I found it good enough for what I needed (i.e. usual way to type/search/copy/move/...)
Here's how I installed the vim latex-suite on Ubuntu:
sudo apt-get install vim-latexsuite sudo vim-addons -w install latex-suite