The 64 Studio Platform Development Kit (PDK) is a version control system for GNU/Linux distributions, allowing the creation and management of many different projects, based on Debian and Ubuntu sources. PDK is written in Python, and the source code is well commented and contains documented examples.
Bastard is virtual server oriented patchset, containing essential elements for building virtual server container machines. It includes a CTX-VS patch, squashfs for creating a small template server, lufs and bme for easily creating overlayed filesystems on top of the template, and honeynet- inspired extensions to enhance monitoring of hosted servers. It also includes VPN extensions like OpenSWAN, MPPE, and CIPE to enable direct access to hosted virtual servers in situations where IPs are scarce.
Chiron FS is a FUSE based filesystem that implements replication at the filesystem level like RAID 1 does at the device level. The replicated filesystem may be of any kind you want; the only requisite is that you mount it. There is no need for special configuration files; the setup is as simple as one mount command (or one line in fstab).
The Entitlement Based Scheduler (EBS) is a modification of the Linux O(1) CPU scheduler that introduces entitlement based scheduling for SCHED_NORMAL tasks in Linux 2.6 kernels. The design features of the O(1) scheduler that address the issues of scalability and efficiency are retained. Entitlement based sharing means that each task has its own variable entitlement to CPU resources, and the scheduler allocates more CPU time to tasks with greater entitlement. The priority of each task is continually adjusted to achieve this aim.
Linux, in the tradition of UNIX-like operating systems, implements file system permissions using a rather coarse scheme. While this is sufficient for a surprisingly large set of applications, it is too inflexible for many other scenarios. For that reason, all the major commercial UNIX operating systems have extended this simple scheme in one way or the other. This is an effort to implement POSIX-like Access Control Lists for Linux. Access Control Lists are built on top of Extended Attributes, which can also be used to associate other pieces of information with files such as Filesystem Capabilities, or user data like mime type and search keywords.
Hardened Debian improves Debian GNU/Linux with high security and hardening features, hardened kernels and packages, DHKP, and other security related enhancements. It makes systems more difficult to compromise using common attacks such as race conditions, chroot jail escapes, and buffer overflows.