https://www.doorbuzzing.com/<p>It's a simple site that let's you create rules for your apartment building's door intercom like:<p>- Open 8am-5pm<p>- Person-specific PIN codes at night<p>- Simul-ring multiple numbers<p>Finished it a while ago but never got around to doing anything with it; handful of active beta users.<p>Built on Twilio and Rails. Costs about $20/month to run.<p>Email: me {at} darrennix dot com