Nitro Alternatives for Mac OS X

Simplenote is a minimalist note-taking application designed for speed and efficiency. It provides a clean interface across multiple platforms, focusing on text-based notes with robust synchronization and versioning capabilities. Ideal for capturing ideas quickly and accessing them anywhere.

Things is a highly acclaimed task manager designed for macOS, iPadOS, and iOS platforms. It offers a clean, intuitive interface to help users capture, organize, and complete their tasks and projects effectively. Praised for its minimalist design and powerful features, Things aims to make personal productivity effortless and enjoyable.

Task Coach is a free and open-source personal task manager designed to handle compound tasks and notes. It's a versatile tool for organizing your to-do list with support for subtasks, categories, and tracking time spent on tasks, making it suitable for both simple task management and more complex project organization.

Doit.im is a powerful cross-platform task management and GTD service designed to help individuals organize their work and life. It offers synchronization across various devices, enabling users to manage tasks effectively based on the Getting Things Done methodology.

Notational Velocity is a minimalist, keyboard-centric note-taking application for macOS.

2Do is a powerful and flexible task management application offering a unique approach to organizing your life. With a focus on simplicity and customization, it provides tools for everything from quick notes to complex project management.

Tasque is a free and open-source task management application designed for simplicity and efficiency. It helps users organize tasks, manage to-do lists, and optionally track time.

Quiver is a robust note-taking application designed for developers, offering a powerful and flexible platform for organizing, writing, and managing notes. It seamlessly integrates rich text, code snippets, markdown, and LaTeX within a single note, providing a unique blend of capabilities for technical users.

Conqu is a versatile task management application designed to help users organize their tasks, projects, and notes effectively. It offers a robust feature set including cloud sync, hierarchical task structures, integrations with popular services, and tools for both individual productivity and team collaboration.