SQLite with pure Go.
The Tabular Data (TDAT) Data Interchange Format.
Webwatch URL monitoring
Webwatch checks HTTP/HTTPS URLs and sends mail if there's a problem.
Install a Java Web App on Linux
I do this over and over again, so I wrote it down as a reference for future me.
How do you know your backup files are still alive?
Commonmark for Java
Write tech docs in plain text
...and dont' use word processors