Dmidecode reports information about your system's hardware as described in your system BIOS according to the SMBIOS/DMI standard. This information typically includes system manufacturer, model name, serial number, BIOS version, asset tag, and a lot of other details of varying level of interest and reliability, depending on the manufacturer. This will often include usage status for the CPU sockets, expansion slots and memory module slots, and the list of I/O ports.
The PCI Utilities package contains various utilities dealing with the PCI bus, and also a library for portable access to PCI configuration registers. It includes `lspci' for listing all PCI devices (very useful for debugging of both kernel and device drivers) and `setpci' for manual configuration of PCI devices.
Tellu is inventory management software that collects hardware and software information automatically from networked servers and workstations, and stores collected data in MySQL database where data is easily readable using a comprehensive user interface usable by any modern Web browser. Devices (like routers and switches), peripherals (like video projectors and displays), and service providers (like hosting and maintenance) can also be stored in the database using a Web interface called Tellu Skin. Inventory management is only one part of Tellu's capability, Tellu offers the possibility to group together workstations, servers, devices, passwords, file attachments, and others to form a faction. For example, a faction can contain all the stuff that a development team needs in their development environment.
Leevi is a user interface for the Lexicon MX300 reverberation device (and possibly other MX devices). It is similar to what Lexicon ships along with their devices for Windows operating systems. Leevi works with POSIX compatible operating environments, like Linux, FreeBSD, NetBSD, OpenBSD, and so on.