This plugin provides normal and visual mode mapping targets to insert escaping backslash characters before regular expression metacharacters for text selected by a motion, as a quick way to put a literal string into a regular expression context.
It's useful generally as a shortcut, but the author particularly likes it for keeping track of backslash-heavy expressions where counting gets tiresome.
For example, in the default BRE mode, this string:
foo * ^bar $\ baz \ quux
foo * \^bar \$\ baz \ quux
Copyright (c) Tom Ryder. Distributed under the same terms as Vim itself.