Cross-platform codeeditor, with syntax highlight for 300+ languages. Has lite interface with tabs. Has JSON config files instead of the options dialog. Supports Python extensions. Documentation wiki: http://wiki.freepascal.org/CudaText
Research Description Language (RDL) is an XML application for describing and publishing scientific research efforts. Research Editor (REd) is a tool for editing RDL documents, and exporting them to LaTeX, PDF, etc.
TeXPerfect plans to be a cross-platform, extensible, user-friendly yet expert-tunable visual TeX implementation. The most important feature will be a split screen (inspired by WordPerfect(R) Reveal Codes) showing the underlying TeX code.