TikZiT is a cross-platform application that allows the creation and modification of TeX diagrams written using the pgf/TikZ macro library. It is especially geared toward rapidly creating "dot"-diagrams for use in academic papers.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.