The TeX Live software distribution offers a complete TeX system for a variety of Unix, Macintosh, Windows and other platforms.
Network Security Services (NSS) is a set of libraries designed to support cross-platform development of security-enabled client and server applications.
Qt is a software toolkit for developing applications. This package contains base tools, like string, xml, and network handling.
PCRE, Perl-compatible regular expression, library has its own native API, but a set of wrapper functions that are based on the POSIX API are also supplied in the libpcreposix library.
Elfutils is a collection of utilities, including stack (to show backtraces), nm (for listing symbols from object files), size (for listing the section sizes of an object or archive file), and so on
The OpenSSL toolkit provides support for secure communications between machines. OpenSSL includes a certificate management tool and shared libraries which provide various cryptographic algorithms and