xmlJ is a Java XML editor. It can edit and validate XML documents.
Protocol Buffers Editor is a viewer and editor for Google's Protocol Buffers binary files. Information is displayed as a tree and can be updated, saved as XML or HTML, and compared to another saved file.
A generic library for real-time communications with asynchronous I/O support.
A tool to individually sign each UID on a set of PGP keys and email them off.