SWI-Prolog is a Prolog implementation that specifically aims at large and real-world applications. TRILL is implemented to pursue the same objective.
SWI-Prolog provides rich libraries for web programming, RDF handling, database access, networking, etc. We can not expose the full system in the web version for various reasons, security being the most important. If you want to work on a real application, download your own copy of SWI-Prolog.
Well, the online version can offer things that a local copy can not. Here are some examples.
The current online version is based on SWISH, TRILL on SWISH will be maintained up to date with it. These are the main plans for SWISH:
WARNING: if you are using Cliopatria, at the moment you cannot have installed both TRILL on SWISH and SWISH. We are working to allow you to install both on the same installation of Cliopatria. If you need both the application you can use the standalone versions. However, with TRILL on SWISH you can execute Prolog queries as in standard SWISH.
Please be patient or contribute to TRILL on SWISH at GitHub