GraphicEdit

This plug-in allows you to create and place a GitHub css3 badge to your webpage on wordpress. With the help of this plug-in you create a css3 badge for your users or followers helping them to follow your GitHub account. This plug-in is very useful for GitHub users, for users who would like to promote his/her GitHub on WordPress.
Links: <a href="http://graphicedit.com/" rel="nofollow ugc">Author Homepage</a>

GitHub Badge

This plug-in allows you to create and place a GitHub css3 badge to your webpage on wordpress. With the help of this plug-in you create a css3 badge fo …

Sharaz Shahid

Code Widget is simple widget allows you to insert any arbitrary Text/HTML and run PHP Code or Short Code. This Widget parses PHP code into simple text and much more.
Only users with the unfiltered_html role will be allowed to insert unfiltered HTML. This includes PHP code, so users without admin or editor permissions will not be able to use this to execute code, even if they have widget editing permissions. 
This plugin is developed and maintained by <a href="https://twitter.com/sharazghouri1" rel="nofollow ugc">Sharaz Shahid</a>

Code Widget

Code widget help  to  add  Short Code, PHP Code, HTML, and Simple Text in widget.

GitHub Badge vs Code Widget