Better HTTP Redirects makes your Blog's redirects to play more nicely the HTTP standards.

Control loading of external files when developing locally

A simple WordPress plugin that redirects your site to HTTPS

HTTP Express enables a php based HTTP proxy to add correct HTTP headers to images, css and javascripts. Useful if you want to improve cache usage and reduce bandwidth impact. Requires Apache with mod_rewrite enabled to work.

Normalize URLs makes Wordpress to play more nicely regarding URLs in HTTP Requests.

Force protocol relative (\ instead http:\ or https:\) for files added in the content editor (eg. post, page)

Strictly System Check is a plugin that periodically checks your site checking your database and server and reporting if any problems are found.