Free implementations of mpi software for linux

Fast MD5 Implementation in Java is a heavily optimized implementation of the MD5 hashing algorithm written in Java.
Fast MD5 Implementation in Java includes an optional native method for even greater speed improvements.
How Fast Is It?
Short answer:Much faster than any other Java implementation that I have tested and (surprisingly) even faster than the native, non-Java MD5 implementation on some systems.
Long answer:First of all, it is important to note that the term "fast" is used here in relative terms. The implementation of the MD5 message digest algorithm available on this page is written in Java and is fast compared with other implementations written in Java, both because it is heavily optimized by itself and because there is an optional native method that makes it even faster when the platform supports it. How it compares to a sensible implementation written in a language, such as C, that is compiled directly to machine code, is heavily dependent upon how good of a job the JIT compiler in your JVM does in compiling the code or whether you are able to use the optional native method.
Enhancements:
- Martin West contributed a bug fix and some code refactoring to make all targets work out of the box in the Ant build file. Previously, the "dist" target did not work if the "docs" directory was not present.

PFScalibration project provides an implementation of the Robertson et al. 2003 method for the photometric calibration of cameras and for the recovery of high dynamic range (HDR) images from the set of low dynamic range (LDR) exposures.

Tools provided with this software can be used for photometric calibration of both off-the-shelf digital cameras and HDR cameras as described in the MPI Research Report. A short tutorial on calibration of the LDR cameras and the recovery of the HDR images from multiple exposures is provided below. For details on the calibration of the HDR cameras please refer to the research report.

Objective Modula-2 programming language is a hybrid between Smalltalk and Modula-2 based on the object model and runtime of Objective-C.
The design is an example how native Cocoa/GNUstep support can be added to static imperative programming languages without implementing a bridge.
Objective Modula-2s scope encompasses the design of the Objective Modula-2 programming language and the implementation of a compiler to implement it. The initial compiler will generate Objective-C source code.
Enhancements:
- This code is used to verify ideas and concepts which come up in the course of defining the language.
- It is in an early stage, incomplete and subject to frequent changes.

BSPonMPI is a platform independent software library for developing parallel programs. BSPonMPI implements the BSPlib standard (with one small exception) and runs on all machines which have MPI.
This last property is the main feature of this library and with this feature it distinguishes itself from other libraries such as the Oxford BSP Toolset and PUB.
What are MPI and BSPlib?
MPI stands for Message Passing Interface. This API should make it easy to write a parallel program. However in practice it is still very complicated, because the API exists of hundreds of functions. It is still like programming in a very low level programming language, e.g. assembly.
Astonishingly there exists another API which is designed for the purpose and is very simple. It consists of only 20 primitives, which provide the same functionality and speed. BSPlib, as this other API is called, allows you to write parallel programs according to the BSP programming paradigm, see e.g. Parallel Scientific Computation: A Structured Approach using BSP and MPI by Rob H. Bisseling.
This paradigm lets you program a parallel algorithm in a very structured manner, resulting in readable and fast code. BSPlib is already implemented for several supercomputers and pc clusters, but as it is less popular than MPI, it is not implemented for all hardware platforms. As engineers and mathematicians always want the last percentage of computing power, an efficient implementation on top of MPI is imperative.
Why should I use it?
Currently there are two major BSPlib implementations: Oxford BSP Toolset and PUB. Both are implemented for specific hardware platforms (Cray T3E or SGI Origin, etc...) and they have a platform independent version on top of MPI. However the architecture of their software library is optimised for the use of hardware specific features. Building on top of MPI was never their primary objective. So if your hardware/software is not supported by one of these two libraries, then you should use BSPonMPI in combination with an MPI library.
Enhancements:
- The main data structure has been rewritten, which resulted in a big performance increase.
- Now it is ready for the real world, as it offers BSP communication at almost the same speed as the Oxford BSP Toolset.
- Sometimes, it is even faster.

ParallelKnoppix is a remastered edition of KNOPPIX that allows setting up a cluster of machines for parallel processing using the LAM-MPI and/or MPICH implementations of MPI.

Getting the cluster up and running takes less than 15 minutes, if the machines have PXE network cards. Starting from version 2.2, the distribution is based on Debians unstable branch, rather than KNOPPIX.

NNTP Client Lib is a Java implementation of RFC 997 for newsreaders, with support for authentication and logging.
NNTP Client Lib is meant to be used by newsreader implementations as some NNTP commands irrelevant for newsreaders are not implemented. Support for MIME or any other article encoding is not included.
If you want to quickly see nntpClientLib working, run NewsDemo . Note that this prints every message to System.err; you can edit NewsDemo.java and choose any other PrintStream.
KNOWN ISSUES:
- The POST and AUTHUSER commands havent been tested (yet).
TODO List:
- FIX NNTPConnectionImpl.disconnect() NullPointerException if host is unreachable.
- Add SSL support.
Enhancements:
- A new logging system and code cleanup.

Tartan is a text parsing engine targeted at wiki text. The syntax specification is defined in YAML in the form of regex-based rules.

It supports layering and multiple output types. Rules for Markdown to HTML are included, with optional layered extensions for tables. Tartan text parser is implemented in Ruby, but looking to have implementations in other languages.

Twisted Mail project provides client and server implementations of SMTP, POP3, and IMAP4.
These differentiate themselves from the Python standard library implementations both by presenting a much higher-level, easy-to-use interface and in their server components, which allow the implementation of custom servers for each protocol without dealing with protocol-level issues.
Twisted Mail includes a simple demonstration email server which accepts messages over SMTP, stores them in a Maildir arrangement, and can serve them to clients over POP3.
Enhancements:
- The IMAP4 client now properly quotes usernames and passwords when necessary.
- It also handles unsolicited FLAGS responses.
- The IMAP4 server can now parse multiple literals in a single command and to FETCH requests with multiple BODY parts.
- A bug where Deferreds returned from IMAP4 client methods would not receive connection lost notification has been fixed.
- Startup time on OS X has been improved.
- The SMTP server has been sped up.
- The POP3 mailbox API has been expanded to allow Deferreds to be returned in some cases.