Non-root ssh server with scp, sftp, and rsync.

A tool for visualizing sound that can be used to tune pianos.

A reverse polish notation programmable scientific calculator.

Simple metronome. No ads, no frills.

BusyBox for Android. Does not need root.

A development environment for the Befunge esoteric programminglanguage.

Simplest podcast (RSS enclosure) downloader.

A simple folder-based MP3 player