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

Damus - The social network you control

Wildcard - Discover, connect and meet people at communities

Peerlist - Peerlist is a community-led professional network for people in tech with powerful work profiles at its core.

Ripple - Ripple connects banks, payment providers, digital asset exchanges and corporates via RippleNet to provide one frictionless experience to send money globally

Cohort - Find the people you need through the people you already know