Change Text Case
Change Case adds buttons to change text case in the WordPress visual editor.
Plugin tag: case
To Title Case
Automatically convert post titles on-the-fly, using Kroc Camen's port of John Gruber's title case.
Case Insensitive URL’s
This plugin runs automatically at the beginning of each page load to insure every request…
Case-Insensitive Passwords
Enables case-insensitive authentication for new passwords created on your WordPress website.
Capitalize Text Input
Aren't you tired of rewriting the titles of your posts pasted in uppercase?
Text Beautify
Cleans up posts and comments for sentence case or title case, fixes punctuation, makes quotes…
Title Case
Use To Title Case instead! https://wordpress.org/plugins/to-title-case/