lsb-fhs tests the Filesystem Hierarchy aspects of the Linux Standard Base. The V1.0 and V2.1-X tests correspond to FHS2.0 and FHS2.1, respectively, and are now obsolete. The V2.2-X tests correspond to the FHS2.2 specification. The 2.2 tests are the current tests used for LSB 1.3 certification. The V2.3-X tests correspond to the FHS 2.3 specification and will replace the V2.2 tests for LSB 2.x certification. The V2.3 tests have yet to be formally approved by the LSB test team.
The LSB-VSX test suite is a version of The Open Group's VSX-PCTS, being used as part of the Linux Standard Base test program. This version of the VSX-PCTS has been setup to autoconfigure on Linux systems. A front end script install.sh is used to auto install, setup and run the test suite. In theory this should allow running of the test suite by those unfamiliar with POSIX.1 and its myriad of options and thus the associated test suite configurables.
VSTHlite is a lite version of The Open Group's Threads verification suite VSTH. VSTHlite is a test package for use with VSXgen (the generic VSX test framework), and contains 700 tests for a subset of the POSIX96 threads interfaces and headers. It can be used standalone or together with other test packages under the VSXgen framework.
gmuck assists you in generating valid (X)HTML by examining the source code that generates it. It is not a replacement for real validation tools, but is handy for quick checks and in situations where validation of the actual markup is troublesome. It is a line-oriented tool, so its structural checking capabilities are limited, but it makes an attempt to report syntactical errors as well as providing some lint-like features.
WWW::PkgFind watches Web sites, FTP sites, GIT repositories, etc. for new code releases, and downloads them. In other words, it's like a Web spider tuned for downloading software packages and patches. It is also able to generate a queue of incoming packages, to allow subsequent processing (such as running tests on them).
Perl::Critic is an extensible framework for creating and applying coding standards to Perl source code. Essentially, it is a static source code analysis engine. It is distributed with a number of Perl::Critic::Policy modules that attempt to enforce various coding guidelines. Most Policy modules are based on Damian Conway's book Perl Best Practices. However, Perl::Critic is not limited to PBP, and will even support Policies that contradict Conway. You can enable, disable, and customize those Polices through the Perl::Critic interface. You can also create new Policy modules that suit your own tastes.