TaskForest is a simple but expressive job scheduler that allows you to chain jobs and tasks and to create time dependencies. It uses plain-text configuration files to specify task dependencies. It comes with a built-in RESTful Web service. It was originally designed for a single machine, but support for multiple machines is planned.
Dexter is a tool that allows users to define extended attributes which can be associated with descriptors and editors. These attributes can be embedded into any well-formed XML document. The resulting embellished document, the 'source', is then input to the dexter engine. This will generate one or more XSLT stylesheets describing the input document interpolating editor modifications and any instructions specified by the descriptors. As dexter's operations are specified exclusively with extended attributes, all but the most unforgiving of XML content viewers will continue to see the decorated source exactly as the designer saw it before.
Coro is a package providing both low-level coroutines as well as a high-level multitasking abstraction on top of Perl. It allows you to parallelize LWP and other network protocols with ease. Unlike the so-called "Perl threads/fork emulation", they provide a real shared address space (like real threads) without the associated race conditions and performance loss, while maintaining a very low memory overhead (2-3kb/coroutine). The package comes with examples and many supporting modules.
The Mobile Web Proxy is a (CGI) tool to make more Web pages available from some mobile devices (cell phone Web browsers, etc.). It employs tag cleaning and paging so that Web pages it can access have far greater chances of being rendered on devices that cannot display overly large or complex pages. It is simple, but it seems to substantially extend the portion of the Web available from devices that otherwise display messages like "413: Page cannot be displayed."