Free system software

rEFInd is a boot manager for UEFI and EFI-based machines. It can be used to boot multiple operating systems that are installed on a single non-volatile device. It also provides a way to launch UEFI applications.

JHOVE (JSTOR/Harvard Object Validation Environment) - pronounced "jove" - is a format-specific digital object validation API written in Java. JHOVE was a joint project of JSTOR and the Harvard University Library to develop an extensible framework for format validation. The Open Preservation Foundation took over stewardship of JHOVE in February 2015.

eBPF is a technology that can run programs in a privileged context such as the operating system kernel. It is the successor to the Berkeley Packet Filter (BPF, with the "e" originally meaning "extended") filtering mechanism in Linux and is also used in non-networking parts of the Linux kernel.

terminal multiplexer software

distributed SQL query engine

Bootable USB flash drive creation software

UPower (previously DeviceKit-power) is a piece of middleware (an abstraction layer) for power management on Linux systems. It enumerates power sources, maintains statistics and history data on them and notifies about status changes. It consists of a daemon (upowerd), an application programming interface and a set of command line tools. The daemon provides its functionality to applications over the system bus (an instance of D-Bus, service org.freedesktop.UPower). PolicyKit restricts access to the UPower functionality for initiating hibernate mode or shutting down the operating system (freedesk

open source project that provides pre-packaged server software appliances