LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. That can mean many things, but the only scenario in which LibHTP has been tested so far is the one when you need to parse a duplex HTTP stream that you have obtained by passively intercepting HTTP traffic. Just feed the raw TCP stream to LibHTP and it will do the rest.
WAF-FLE is a console for ModSecurity. It allows modsec administrators to view and search events logged by mlogc or mlog2waffle. The dashboard shows a graphical view of events, and when combined with the powerful drill-down filter allows quick searching for relevant events. Events can be viewed in detail, whether sent by one or many sensors.