Merge pull request #591 from rezonanc/suggestion/Lychee

[web applications] electerious/Lychee

README.md

 * [phpMyAdmin](https://github.com/phpmyadmin/phpmyadmin) - A web interface for MySQL/MariaDB.
 * [Adminer](https://www.adminer.org/) - Database management in a single PHP file.
 * [Grav](https://github.com/getgrav/grav) - A modern flat-file CMS.
+* [Lychee](https://github.com/electerious/Lychee) - An easy to use and great looking photo-management-system.
 
 ## Infrastructure
 *Infrastructure for providing PHP applications and services.*