protobuf-dt is Google’s Eclipse-based editor for protocol buffers. It provides all the features you’d expect from an Eclipse editor (syntax highlighting, outline view, content assist, etc.) plus some protocol buffer-specific features, such as "Open Declaration" (hyperlinking) support, including imported .proto files, configurable integration with protoc, and automatic removal of trailing whitespace.
kbd-cheatsheet is a small application that generates a list of Eclipse keyboard shortcuts from Eclipse's CSV export function. The shortcuts are grouped, sorted, and arranged according to user defined settings. Since the basis for the sheet is your current Eclipse installation, everybody can create their own personalised version.
TOPCASED stands for Toolkit in OPen source for Critical Applications and SystEm Development. It is a system and software engineering workshop based on Eclipse. It aims to provide the tools required to go from requirements to the implementation stages. Focused on modeling development engineering, it includes several graphical editors (for ECORE, UML, SysML, SAM, AADL, and more), an OCL rules editor and checker, several code generators (SMUC, UML2C, UML2Java, UML2Python), a document generator, gPM (a ticket tracker), xHDL tools, Tramway (a requirements traceability framework), and more. External tools can be easily connected to the workshop through its API or models.