kmon is an interactive kernel monitor for the terminal. It can insepct and load kernel modules, and it can monitor kernel activity. It basically combines dmesg and kmod into one application. Note that is probably needs to run as root.

Disk usage analyzer with console interface written in Go. Intended primarily for SSD disks where it can fully utilize parallel processing. However HDDs work as well, but the performance gain is not so huge.

Metadata within a file can tell a lot about you. Cameras record data about when a picture was taken and what camera was used. Office applications automatically add author and company information to documents and spreadsheets. Maybe you do not want to disclose those information.

These are a selection of various games that use the Xaw toolkit. They are all from the 80's and 90's and look the part. As a result, they are also very lightweight. There are a bunch of solitaire (patience) variants, mille bournes, cribbage and dominos.

The Debian Fast Track repository digitally signs its Release files. This package contains the current archive public key used for that.

Denemo is a free (GPL) graphical music notation editor that lets you rapidly enter notation which it typesets using the LilyPond music engraver, creating notation straight from your input that outshines the commercial competition. You can compose, transcribe, arrange, listen to the music and much more.