Class::Tiny::Antlers provides Moose-like has, extends, with, before, after and around keywords for Class::Tiny. (The with keyword requires Role::Tiny; method modifiers require Class::Method::Modifiers.)

A free cross-platform library of fast C++ routines for plotting data in up to 3 dimensions. It can export plots to bitmaps and vector EPS, SVG, IDTF files. There are simple window interfaces based on GLUT, FLTK and/or Qt. MathGL can also be used in the console. There are interfaces to a set of languages, such as, C, Fortran, Pascal, Forth, Python, Octave.

Mailparse is an extension for parsing and working with email messages.

This PostgreSQL extension shows the query plans of all currently running SQL statements. Plan output format can be plain text (default), JSON, YAML, or XML.

Memcached is a caching daemon designed especially for dynamic web applications to decrease database load by storing objects in memory.

This is the GNU Modula-2 standard library that comes with the gm2 compiler.