sleek is an open-source (FOSS) todo manager based on the todo.txt syntax. It's available for Windows, MacOS and Linux.
Cost / License
- Free
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux




Holiline Reminder is described as 'Is both an event reminder and a calendar. Holiline’s aim is to ensure that you do not forget about a friend’s birthday, an important holiday, or another significant event. By default, it takes over the taskbar to remind you about important events that are' and is a todo list manager in the office & productivity category. There are more than 100 alternatives to Holiline Reminder for a variety of platforms, including iPhone, Web-based, Android, Windows and iPad apps. The best Holiline Reminder alternative is Trello, which is free. Other great apps like Holiline Reminder are Google Calendar, Todoist, Habitica and TickTick.
sleek is an open-source (FOSS) todo manager based on the todo.txt syntax. It's available for Windows, MacOS and Linux.




Zenkit is a hyper-flexible SaaS platform for managing projects, databases, and more. Use Kanban boards, tables, or custom views to organize tasks, track data, and collaborate with your team. Build a CRM, financial planner, or simply plan your day—all in one intuitive workspace.




A simple calendar with optional CalDAV synchronization. You can easily create recurring events and setup reminders, it can also display week numbers.




Task management has never been this easy. Simplicity, however, is not achieved at the expense of powerful features. Download your free trial today and start getting more things done with less effort.




Taskwarrior is an ambitious project bringing sophisticated capabilities to a simple and elegant productivity tool. You'll find it has customizable reports, charts, GTD features, Lua extensions, device synching and more, all while our international team provides excellent...




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Rainlendar is a feature rich calendar application that is easy to use and doesn't take much space on your desktop. The application is platform independent so you can run it on all major operating systems: Windows, Linux and Mac OS X.



Any.do is an award-winning app used by millions of individuals, families and teams to stay organized and get more done.



Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists. It is designed for composite tasks, and also offers effort tracking, categories, notes and more.




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Brings together calendars, to-dos, productivity apps, and schedulers in one platform. Integrates with major services like Google Calendar, iCloud, Todoist, and video conferencing tools such as Zoom. Offers native scheduling similar to Calendly, enhancing time management efficiency.



