We’ve been looking for a decent ontology editor for a while now. The problem is that most editors are either to technical or too cumbersome to use for entering a lot of data. But it looks like we have finally found something suitable!
RDFRoom is a graphical RDF tool. It seems to work quite well (it’s written in Python) and performance is acceptable, at least for smaller graphs. Here’s a screenshot:
As you can see, I’m just deleting some outdated data…