Hot Copy creates an instant point-in-time snapshot of any block device while the system is running without interrupting applications or requiring the use of LVM. As block level changes are made to the real device, hot copy makes a backup copy of the changed block. The changed blocks are efficiently stored in unused space on your hard disk. These stored changed blocks maintain a point-in-time snapshot and space is only needed when you make changes to the real device. You can even write to your snapshots.
sqlzma is a patch against lzma and squashfs that makes squashfs support both LZMA compression and ZLIB compression. A squashfs image file that uses LZMA compression has no backward compatibility, but the patched squashfs and its tools can handle the old squashfs image generated by the unpatched squashfs-tools.
The Logic File System enables the user to access files through an additionnal mountpoint, /lfs, where powerful logic queries can be issued and navigation can be done through different dimensions, like date, size, or extension. For instance, LFS allows the user to perform the following commands in the shell: "cd /lfs/ext:mp3|ext:ogg/year:1973/genre:Disco/" and "ls artist:BeeGees/ artist:DonnaSummer/ artist:Chic/".
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).
NTFS-3G is a stable read/write NTFS driver. It is available for over 180 Linux distributions and the default read/write NTFS driver for most major ones. It has been ported to many other operating systems like FreeBSD, NetBSD, Solaris, Haiku, and Mac OS X, and to little/big-endian, 32/64-bit, and MMU-less computer architectures.
xlike is a patch collection for the Linux vanilla kernel. It includes as many stable enhancements for the Linux kernel as possible. These include code from Xen, Kernel Mode Linux, Rule Set Based Access Control, Novell AppArmor, Openswan, grsecurity, Linux VServer, Linux-PHC, web100, Nefilters, Suspend2, Speakup, SquashFS, UnionFS, Bootsplash, BadRAM, and more. It also contains many drivers and fixes.