Placid is a Web-based frontend for Snort that uses MySQL. It supports searching, sorting, and graphing of events, and was designed for speed and to have little overhead.
You can download it from the following link: https://packetstormsecurity.com/files/download/34365/placid-2.0.3.tar.gz
Source: https://packetstormsecurity.com/files/34365/placid-2.0.3.tar.gz.html