The strongSwan VPN suite uses the native IPsec stack in the standard Linux kernel. It supports both the IKEv1 and IKEv2 protocols.

lxml is a new Python binding for libxml2 and libxslt, completely independent from existing Python bindings. Its aim:

runit is a collection of tools to provide system-wide service supervision and to manage services. Contrary to sysv init, it not only cares about starting and stopping services, but also supervises the service daemons while they are running. Amongst other things, it provides a reliable interface to send signals to service daemons without the need for pid-files, and a log facility with automatic log file rotation and disk space limits.

Samba is an implementation of the SMB/CIFS protocol for Unix systems, providing support for cross-platform file and printer sharing with Microsoft Windows, OS X, and other Unix systems. Samba can also function as an NT4-style domain controller, and can integrate with both NT4 domains and Active Directory realms as a member server.

SymPy is a Python library for symbolic mathematics (manipulation). It aims to become a full-featured computer algebra system (CAS) while keeping the code as simple as possible in order to be comprehensible and easily extensible. SymPy is written entirely in Python and does not require any external libraries, except optionally for plotting support.

Evolution is a groupware suite which integrates mail, calendar, address book, to-do list and memo tools.