Google Tasks Alternatives for Windows

Notezilla is a sticky notes app for Windows.

Todoist: To-Do list and Task Manager.

NoteLedge note-taking and management solution.

ToDoList is a jack-of-all-trades organizer software that goes far beyond managing shopping lists. The tool allows to create short and precise task list.

A simple and friendly task manager written in Python.

CherryTree is an hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.

MyLifeOrganized (MLO) is the most flexible and powerful task management software for getting your to-dos finally done.

fluxday is a user-friendly, free & opensource task & productivity management tool for growing startups.

Ora is a real-time all-in-one workspace for teams.

Org-mode is an Emacs Mode for Notes, Planning, and Authoring.

EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries, etc.

todo.txt is software and operating system agnostic; it's searchable, portable, lightweight and easily Todo management software.

Avaza is a beautiful online software suite with modules for Project Management, Timesheets, Expenses & Invoicing. Access from anywhere, with any device.

UV Outliner is a single pane outliner with multicolumn support.

Guide is an application that allows you create documents ("guides") which inherently have a tree (which you can modify as you please) and text associated with each node of the tree.

Priority Matrix is a time management software application that is supported on a number of platforms, including Microsoft Windows, Mac OS X, Android, and iOS. It is based on the Eisenhower Method of arranging tasks by urgency and importance in a 2x2 matrix.

germ lets your team capture every great idea, brainstorm and turn them into actionable project plans.

Conqu is a simple yet powerful task management tool designed to help you conquer your inbox and get things done.

Go For It is a simple and stylish productivity app, featuring a to-do list, merged with a timer that keeps your focus on the current task.

Holiline Reminder is a free software calendar program for Windows.

buckets.co helps you optimize workflows & collaboration at all levels.

Goalton.com is a platform for goal and task management.

FCorp My Calendar is a free software to manage a diary, notes, schedules, birthdays, etc.