Apps similar to sleek include Super Productivity, which is free and open source. Other options are Todoist, TickTick, Tasks.org and Planify. Todo List Managers like sleek are a crowded field, with more than 100 alternatives for Android, Windows, Mac, iPhone and the web.
Merkuro is a calendar and contact application that allows you to manage your tasks, events and contacts. Merkuro supports both local calendars as well as a multitude of online calendars: Nextcloud, Google® Calendar, Outlook®, Caldav, and many more.
Germany
EU
Nirvana is a secure, cloud-based GTD® task manager accessible from your desktop web browser and mobile devices. If you have more to do than you can manage in your head, or if you want greater clarity of mind and focus in life, Nirvana is for you.
Canada
MyInfo is a personal information manager for Windows. It will help you capture, organize, edit and share ideas, documents, tasks, and web pages.
BulgariaEU
StepList is a productivity app for important routines. Create, manage, share, and perform checklists. Stay focused and never miss a step with StepList.
United States
Japan
Notational Velocity is a mouseless application for storing and retrieving notes.
United States
Simple GTD application to manage your tasks and to-dos. Syncs with web server. Complete with the usual Inbox, Today, Next, Tomorrow, Scheduled and Someday "buckets" as most GTD programs have. You can also create Projects for tasks with multiple steps.
China
Clear is a colorful canvas for your thoughts, plans and goals. Here's what makes it uniquely fun and effective.
United States
Provides project and task organization for teams or individuals, featuring file sharing, commenting, offline access, reminders, deadline tracking, calendar integration, tagging, progress views, project sections, and home screen widget for urgent tasks and priorities.
PolandEU
To To-Do keep your life in sync. One app for family, work, and personal goals—with AI assistance and seamless sync across all your devices.
SwedenEU
A simple application for creating and organizing task lists, offering essential features for efficient task management, similar to Notepad in its simplicity and functionality.
OpenTodoList is a todo list and note taking application. It is available for Linux, macOS and Windows as well as on Android. Your information can be shared across devices to keep everything up date date, where ever you go.
Switzerland
