Open source alternatives to Calendly[012]

Excalidraw

★ FEATUREDTYPESCRIPT

Virtual whiteboard for sketching hand-drawn like diagrams

LocalSend

★ FEATUREDDART

Share files securely across devices without servers

LocalAI

GO

Free, open source OpenAI alternative

Cal.com

TYPESCRIPT

Scheduling infrastructure for absolutely everyone

cal-com

★ FEATUREDTYPESCRIPT

An open-source scheduling platform that simplifies appointment booking, integrates seamlessly, and enhances team collaboration.

Tailscale

★ FEATUREDGO

Deploy a modern WireGuard-based VPN with zero configuration. Connect devices securely across clouds, VPCs, and on-premises networks without firewall rules.

Infisical

★ FEATUREDTYPESCRIPT

Open-source secret management platform

Lexical

TYPESCRIPT

Lexical is an extensible text editor framework that provides excellent reliability, accessibility and performance

Timescale

C

Extend PostgreSQL for time-series data with automatic partitioning, scalable ingestion, and advanced analytics for mission-critical applications.

Scalar

TYPESCRIPT

Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.

Rallly

TYPESCRIPT

A user-friendly, open-source tool for coordinating events and meetings without the hassle of back-and-forth emails or messages.

easy-appointments

PHP

Self-hosted appointment scheduling solution with Google Calendar sync, customizable workflows, and no monthly fees. Perfect for healthcare, salons, and service businesses.