SLEPc is the Scalable Library for Eigenvalue Problem Computations.

QPDF is a program that can be used to linearize (web-optimize), encrypt (password-protect), decrypt, and inspect PDF files from the command-line. It does these and other structural, content-preserving transformations on PDF files, reading a PDF file as input and creating a new one as output. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.

This is the GNU C++ compiler, a fairly portable optimizing compiler for C++.

MooseX::LogDispatch provides a Log::Dispatch role for use with your Moose classes.

Music::Chord::Namer optionally exports one sub, chordname, which accepts some notes as either a string or a list and returns the best chord name it can think of.

memcached client for asyncio The API looks very similar to the other memcache clients: