Hugo - Hugo is a general-purpose website framework for generating static web pages.

Cron - Cron Calendar.

Notiv - Notiv is the intelligent meeting assistant that captures and automatically transcribes all your essential voice conversations into clever business outcomes.

zcal - zcal is the fastest way to schedule every meeting for Free and make it personal.

Shepherd - Opens quality content you choose instead of Facebook/Twitter

Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.