Rustup can be used to install Rust and keep it updated. It also allows you to seamlessly switch between the stable, beta, and nightly Rust compilers and tooling.
Members of the Opensource.com community recommend this mix of books covering everything from a fun cozy mystery to non-fiction works that explore thought-provoking topics.
I use the open source XFS filesystem because of the subtle convenience of extended attributes. Extended attributes are a unique way to add context to my data.