Hotaru CMS is an open source, PHP platform for building your own websites. With flexible plugins and themes, you can make any site you like. Download The most common use for Hotaru is social bookmarking. We have all the plugins you need to make your own Digg-style community. Learn more... For developers, Hotaru CMS includes an extensible Admin CP, a powerful plugin system and a unique override feature for designing custom themes. There are dozens of built-in class libraries and some popular 3rd party scripts including ezSQL, htmLawed, Inspekt, JSMin, and SimplePie.