Delins.vim is a project mainly written in Vim Script, it's free.
easy marking of corrections in a document
This is a mirror of http://www.vim.org/scripts/script.php?script_id=1500
This script I use for marking changes in text files with the html ins and del tags.
To mark something something to insert past the current char press
To mark something to be deleted mark it in visual mode and press
D. "..." appears around it.
For convenience R (replace) in visual mode is bound to D