Apps with 'Sync with Google Calendar' feature

Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

Open source note-taking app with Markdown support, to-do integration, and synchronization with cloud services like Dropbox and OneDrive.

Highly customizable browser with built-in ad and tracker blockers, Chromium compatibility, advanced tab management, cross-device sync, and strong privacy features.

Local-first, privacy-focused notebook supporting Markdown and Org mode, offline use, encrypted backup, extensible with plugins, and more.

Free multi-platform software for task management, time tracking, and personal project management. Seamless integration with Jira, GitHub, and GitLab.

Open-source mobile operating system, seamlessly integrating with Google services, enabling extensive app support and hardware compatibility across brands.

Multifunctional cross-device tool captures ideas, lists, voice/photo notes. Features color coding, geo-fencing, checklists, and cloud sync.

Online word processor offering real-time collaboration, document conversion, robust formatting, revision history, redownloading, and language translation.

Open-source client enhancing Thunderbird with more features and bug fixes. Offers security patches and multi-row descriptions like Outlook.

Manages tasks across all platforms with advanced language recognition. It integrates with 60+ tools, and offers templates for various projects.

Your privacy-aware, open-source calendar with intuitive design and multi-platform syncing.

Your calendar is a record of your life. Proton Calendar helps keep it private.

Organize events with encrypted privacy, zero-knowledge and no tracking. Features include multi-device sync, multiple views, and offline support.

Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.

Offline-first app for organizing tasks and notes, with smart creation, calendar view, Markdown and encryption, Material You design, and no tracking or ads.

Work management platform for teams to focus on goals, projects, and tasks, available on mobile, integrating with web, offering offline use and notifications.

eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts, notes and chat.

Material design open source calendar for Android.

E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.

An award-winning cloud-based Project Management software aims to help collaborative teams organize and manage from small enterprise projects to large-scale initiatives.

Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.

Baserow is the secure, open-source platform for building databases, applications, automations, and AI agents — all without code. Trusted by over 150,000 users, Baserow delivers enterprise-grade security with GDPR, HIPAA, and SOC 2 Type II compliance, plus cloud and self-hosted...

Basecamp is a web-based project collaboration tool that allows groups of people to share files, meet deadlines, assign tasks, and centralize feedback.

Cloud platform with Gmail, Drive, Meet for collaboration. Includes Docs, Sheets; management tools via Admin Panel, 2FA security.

Enjoy ease of scheduling with natural language event creation, sync with major platforms, visually appealing color-coded displays, and file attachment support.