Tertim is a simple terminal timer that essentially clones termdown in JavaScript to avoid pip installations. It's not as good as termdown, but it's good enough for me!
NOTE: while developing different output formatting, the -t flag is disabled for now.
$ npm install -g tertim$ tertim 30s # Start a 30 second timer
$ tertim 10:30 # Start a timer until 10:30
$ tertim 17:00 "Workday timer" # Start a timer until 17:00 with a message
$ tertim 15m "Break timer" # Start a 15 minute timer with a message$ git clone ... && cd ...
$ npm link
$ tertim 500m