Kontact is a personal information manager and groupware software suite developed by KDE. It supports calendars, contacts, notes, to-do lists, news, and email. Developed by KDE
License: Open Source
Kontact is an open-source personal information manager that excels in integration with KDE applications and offers robust task management, while Fantastical is a user-friendly calendar app known for its natural language processing capabilities and seamless integration with Apple services.