etcd is a distributed key-value store, used as shared cluster configuration backend. It automatically elects a master server, allows dynamic config data with optional TTLs, provides a JSON API over HTTP with TLS and long polling, uses the Raft protocol for distribution. It's the basis for CoreOS, integrates with fleet/systemd, and thus also provides service discovery.
PacketFence is a network access control (NAC) manager. It includes numerous features, including user registration and sanitation, central wireless and cable-network control, BYOD (bring-your-own-device) configuration, 802.1X support, and layer-2 device isolation. PacketFence is useful for managing small to large networks and intranet-access points.
librtas provides an interface for Run-Time Abstraction Services (RTAS) calls on the 64-bit PowerPC architecture for low-level hardware configuration. It allows to examine hardware states, influencing its state (LEDs), retrieving firmware logs, or loading new firmware. librtasevent allows to parse arbitrary RTAS event responses.
Netdisco is a web-based network managment tool based on SNMP L2/L3. It's suitable for mid-size to large networks, discovers and polls routers and switches for IP to MAC address mapping and port and VLAN routing, or uncover wireless node settings. It can also inventarize or pretty-print the complete L2 network topology.
LTM is a graphical task manager. It provides top-like process lists or an application-grouped list, as well as a load graph. It allows to kill or renice running processes. It comes in a single Java JAR.