SimParEx

SimParEx is a powerful software that allows users to execute a program simultaneously on multiple computers and gather the results with ease. One of the best things about this software is that it has minimal requirements such as TCP, SSH, and Perl, making it hassle-free to use. Additionally, it is designed to be compatible with different platforms, ensuring its seamless integration regardless of the user's operating system.

Another great feature of SimParEx is that nothing special needs to be installed on the slaves, which saves users a lot of time and effort. It also supports the execution of command-line programs, which is essential in today's software development landscape. The task definition is highly flexible and allows for input file generation and command-line construction, thus enabling users to customize it according to their preferences.

While SimParEx cannot compete with the big Distributed Resource Management System (DRM) tools like Sun's Grid Engine or Condor, it is still a reliable and efficient option for those who require parallel execution capabilities. With little effort required, SimParEx does an impressive job and proves to be a great asset for users who need to perform parallel executions.