MarcusPope

A WordPress plugin that converts all URL formats to root-relative URLs to enable seamless transitioning between staging/production host environments and debugging/testing from mobile devices, without the use of hackish tactics like textual find-replace strategies or risky hosts/NAT spoofing strategies.
With Root Relative URLs you can browse your development site from http://localhost/ or http://127.0.0.1/ or from a named network resource like http://mycomputername/ without worrying about links redirecting you back to your site’s URL.
This plugin also modifies the tinyMCE hooks so links and media embedded with built-in tools will only insert URLs from the first forward slash after the domain (i.e. the root of your site.) This means when you push content changes to a staging or production environment they are guaranteed to reference the correct target instead of accidentally referencing a production resource in development or, worse-yet, a development-exclusive resource in production.
It supports path-based MU Installations, but does not support domain-based MU sites due to architectural deficiencies in the WordPress core.
Version 1.5 fixes an infinite redirect problem that is a result of a core bug in WordPress. If you have problems with the <!–more–> tag or permalinks for custom post types, please read the FAQ or new Install Steps for support.
Version 2.2 allows for adding certain URL’s or partial URL’s to a blacklist, meaning I won’t use root relative urls, but dynamic absolute URLs instead for displaying content. This will fix problems with 3rd party plugins, and can be configured on the General Settings page.
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Root Relative URLs

Converts all URLs to root-relative URLs for hosting the same site on multiple IPs, easier production migration and better mobile device testing.

Muhammad Faizan Haidar

clint.s

Love WordPress? Love Bitly? After installing this plugin, you’ll be able to shorten a link and view clicks right from WordPress. Your new links will be saved to Bitly for reference and deeper analysis.
To do that, you must have a Bitly account to use the plugin. Your account is where you store, edit, and view metrics for your links. Register at bitly.com.
No matter the type of site you own (from a personal blog to an ecommerce store and everything in between) Bitly makes it easy to create shorter links and keep an eye on your clicks. Whether you share your links on social, SMS, or email, a short link is easier to manage and remember.

Bitly's WordPress Plugin

Simple & awesome Plugin :-) 
Easy to Configure it with Bitly.


Much Needed Plugin

Create short links to your content with Bitly’s WordPress Plugin.

Root Relative URLs vs Bitly's WordPress Plugin