GRUB is a GPLed bootloader intended to unify bootloading across x86 operating systems. In addition to loading the Linux kernel, it implements the Multiboot standard, which allows for flexible loading of multiple boot images (needed for modular kernels such as the GNU Hurd).

pcs is a corosync and pacemaker configuration tool. It permits users to easily view, modify and create pacemaker based clusters.

The Linux Kernel Device Mapper is the LVM (Linux Logical Volume Management) Team's implementation of a minimalistic kernel-space driver that handles volume management, while keeping knowledge of the underlying device layout in user-space. This makes it useful for not only LVM, but software raid, and other drivers that create "virtual" block devices.

The objective of Certbot, Let's Encrypt, and the ACME (Automated Certificate Management Environment) protocol is to make it possible to set up an HTTPS server and have it automatically obtain a browser-trusted certificate, without any human intervention. This is accomplished by running a certificate management agent on the web server.

scrub iteratively writes patterns on files or disk devices to make retrieving the data more difficult.

WebDAV Ext module complements the Nginx WebDAV module to provide a full WebDAV support.