by terrytsang on WordPress.org
"WP30 By Who" is a simple add-on that enable a small bar for label "Designed by" and social media icons links at the bottom.

Website with bottom "By Who" bar
This is first plugin from Challenge “WP30” by Terry Tsang. It aims to give credits to the maker and also the portfolio and social media link as a marketing add-on for all the WordPress sites.
There are 2 option tabs: