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.