Oleg Tkachenko has released XInclude.NET, an open source implementation of the XInclude 1.0 Candidate Recommendation written in C# for the .NET platform. This supports the XPointer framework, shorthand pointers, element(), xmlns() and xpath1() schemes. The .NET Framework 1.0 is required.
Dave Malcolm has posted Conglomerate 0.7.2, an open source GUI XML editor for Linux written in C, and based on libxml2 and the GTk+ and Gnome libraries. Conglomerate is published under the GPL.
The W3C Timed Text Working Group has posted Timed Text (TT) Authoring Format 1.0 Use Cases and Requirements. "A timed text authoring format is a content type that represents timed text media for the purpose of interchange among authoring systems. Timed text is textual information that is intrinsically or extrinsically associated with timing information." For example, this could be used for subtitles or closed captioning.