open source semantic web project

Question

I am looking for an open source semantic web project, I know there are Jena and Sesame but I'm looking for another open source semantic web project.

Answer 1

What sort of Semantic Web project?

APIs

• dotNetRDF - My C# .Net API
• rdflib - Python API
• ARC2 - PHP API

And there is pretty much one/more API for any language you fancy so if you can elaborate on the language desired I can make an appropriate recommendation

Triple Stores

• 4store - A C Linux based clusterable triple store
• Virtuoso - Commercial Triple Store (written in C++) from OpenLink Software which has a cut down open source version - runs on Windows, Linux and Mac OS X afaik
• AllegroGraph - Commercial Triple Store (written in LISP) from Franz Inc which has a limited (50 million Triples) free to use version

Again there are lots of projects for lots of platforms - elaborate on your target environment to get a better answer

Other Tools

Also there are a variety of GUI tools for things like editing, ontology design etc

Plus you can get CMSs with Semantic Web tech built in such as Drupal 7 and Semantic MediaWiki

Answer 2

I think the only bits missing from RobV's answer are some of the reasoning tools like:

1. Protege
2. Hermit

... some other triple stores:

1. Mulgara
2. Talis Platform this is a service that you can use if you use Open Data and less than XX million triples. I don't remember exactly how many.
3. BigData

... and of course Redland libraries, one of my favourite set of tools with some very useful command line utilities.

Answer 3

You might even look at Drupal - with the release of version 7, Drupal now supports RDFa and any extension of semantic capabilities will surely be welcome.

Answer 4

There a lot of them actually. For example Big Data. You can find more here.