An activity pub implementing federated social network (like Mastodon): https://pleroma.social/
Has the advantage of being written in elixir and having very light server requirements vs Mastodon.
"Healthchecks.io monitoring is a great fit for cron jobs and cron-like systems (systemd timers, Jenkins build jobs, Windows Scheduled Tasks, wp-cron, uwsgi cron-like interface, Heroku Scheduler, ...). A failed cron job often has no immediate visible consequences, and can go unnoticed for a long time."
@d19dotca Ha! Yes, just saw that I upvoted that post last week. Running it myself outside now outside of Cloudron, and finding it solid.
A new, better option might be https://www.goatcounter.com/
"QuickChart is a service that generates images of charts from a URL. Because these charts are simple images, they are very easy to embed in non-dynamic environments such as email, SMS, chat rooms, and so on."