Space Weather by SolarHam
Space weather portal. Looks like a pretty dense but also really handy view of what the Sun's up to at the moment.
Two Stop Bits
Kinda like HackerNews, but for retrocomputing.
tinboard - A terminal-based client for pinboard.in
Tinboard's entry on Terminal Trove
Terminal Trove - The $HOME of all things in the terminal.
Site dedicated to building a list of tools useful in the terminal, and categorising them.