Dapper, or "Distributed and Parallel Program Execution Runtime", is a tool for taming the complexities of developing for large-scale cloud and grid computing, enabling the user to create distributed computations from the essentials: the code that will execute, along with a dataflow graph description. It supports rich execution semantics, carefree deployment, a robust control protocol, modification of the dataflow graph at runtime, and an intuitive user interface. License: GNU Lesser General Public License (LGPL) Changes:
On the fly generation and aliasing of dataflow graph edges are now possible. The API has been simplified, and redundant interfaces have been done away with; at the same time, dataflow graphs are now robust to tampering from malicious users. The concept of execution domain has been introduced to control what executes where. The manual is now substantially complete, and has been updated with a bevy of examples and diagrams. The SourceForge mailing lists dapper-user and dapper-announce have been created.

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