Tasks.org is described as 'Tasks is libre open-source software, based on the original source code from the popular Astrid Tasks & To Do List! Tasks is easy-to-use, feature-packed, flexible and customizable, and synchronizes with a variety of services' and is a very popular todo list manager in the office & productivity category. There are more than 100 alternatives to Tasks.org for a variety of platforms, including iPhone, Web-based, Android, iPad and Mac apps. The best Tasks.org alternative is Super Productivity, which is both free and Open Source. Other great apps like Tasks.org are Notion, Todoist, TickTick and Planify.
Simple way to manage your todo list in AJAX style. Written in PHP and jQuery. Data stored in SQLite or MySQL database. Distributed under the GNU GPL License.
Features
Multiple lists Task notes Tags (and tag cloud) Due dates (input format: y-m-d, m/d/y, d.m.y, m/d, d.m) Priorit.
Russia
TaskLine is a menu bar resident task management app for Mac, integrating your to-do list with a daily timeline.
Japan
Align company goals, KPIs and project management in one system. See progress, detect risks early and keep every team focused on what matters the most!.
Estonia
EU
United Kingdom
A free todo app that shares in seconds — send an invite and anyone can view or edit. Priorities, subtasks, push notification reminders, and real-time sync built in.
MailToDoList lets you manage your Gmail inbox the way you manage a to-do list. It lets you move emails up and down, it lets you group and hide related emails, and it lets you add tasks and notes.
United States
Open-source task manager for Windows and Linux enabling users to track progress with nested and weighted tasks, hierarchies, customizable themes, unit-based weight display, and local-only storage for managing video series and various task lists efficiently.
Free and easy-to-use web-based task management platform enables you to be more efficient. Create tasks and follow progress, view reports, create notes, all in a seamless workflow. Actionmint helps you to be more organized and productive.
CroatiaEU
PopDo is a Mac app that sits in the menu bar for easy access to tasks. It integrates with Reminders and iCloud to store tasks and lists.
SwedenEU
United Kingdom
NoPlex is the world's first productivity and personal organization ecosystem optimized for adults with ADHD and anxiety.
Croniqs is a clean task manager built for people who want structure without complexity. Most productivity tools grow into systems you have to manage. Croniqs goes the opposite direction - it focuses on clarity, and calm workflows.
SwedenEU
