A file-sharing CLI tool, where the files you're sharing never leave your device (well, except for the person you're sharing them to, that is). Note that not all time working on this is tracked in hackatime.
A very simple Slack bot, built in Rust, without the use of heavy Slack-API wrapper crates such as slack_api. Use /fbh-help for a list of commands.
The macropad example, but in Rust and hopefully cooler. This is abandoned, as only QMK, KMK and ZMK are allowed.