What authoring tools are available for RDF?
RDFAuthor, announcement of Oct 25 2001. Open source, GPL. Apple OS X mostly - there is also a Java version that works on Windows, but is missing a save function. You can look at the RDF code and copy/paste to a file of course.
IsaViz: A Visual Authoring Tool for RDF version: 1.2 (released 2003-02-13)
IdeaGraph seems to be an RDF authoring tool.
Mozquery is an open source Mozilla/Firebird add-on to edit and query RDF files. It currently (version 1.0) provides ASRDF, a tool to quickly generate RDF files using a simple terse notation grammar based on the outliner paradigm. ASRDF supports RDF-XML revised syntax.
hackdiary: Using OpenOffice Draw to author RDF by Matt Biddulph at June 16, 2003
some people use ShorthandRDF along with RDFCheckingTools
some people start in XHTML and convert to RDF using XSLT; see GRDDL Data Views: Getting Started, Learning More, EmbeddingRDFinHTML
RDFScribbler (on hold, but part of an interesting infrastructure that may be a useful wiki like platform)
What about authoring tools for specific RDF vocabularies, like foaf?
try Libbys codepiction creation form or the general foaf info creation form
- dublin core forms (CORC?)
What about schema/ontology authoring tools?
see also VisualizingRDF, see OwlAuthoringTools