Free todo lists software for windows

To-do Lister is a simple and effective task management tool for Windows.
Demanding little desktop space and minimizing to the system tray when not required To-do Lister keeps your tasks always at hand.
The intuitive interface of To do Lister makes adding, deleting tasks easy.
The beauty of To-do List is its simplicity.
It has been designed to maximize productivity not procrastination; by removing the unnecessary baggage that so much software suffers from but leaving the essentials.

MyTodo is a fast, lightweight and non-bloated application for creating and managing todo lists, coded in C#. MyTodo lets you open and save multiple todolists.
Every MyTodo list can contain multiple todo items that are organizedin a tree. Those items, again, contain information about the todos description, status, priority, whether you should be reminded or not and a few others. Besides that, it has a lot of other features in order to make life as comfortable as possible.
Main features:
- Tree structure for the best possible overview
- Almost infinite amount of nestable todo lists
- Designed for a very fast usage
- Can be minimized to the system tray
- Todo lists are saved compressed, so they only take a few kilobytes
- Various import and export functions
- Different types of reminders (yearly, monthly, weekly, daily, specific date) for each todo
- Does not affect your computer (no installation needed, uses the windows registry only if you want)
- Support for printing todo lists
- Extensible via plugins
- Post-It notes which can be sticked onto the desktop (Plugin)
- Scrap window that is accessible over a global hotkey to quickly write a note (Plugin)
- Possibility to synchronize todolists between Computers via Internet (Plugin)

Enhancements:
- PluginManager: List stays focused
- NetSync: Now proxy enabled (in Tools->Plugins, select NetSync and press Configure)
- Installer: Downloads .net Framework 1.1 if needed
- NetSync: List needs to be saved first. Other in case of an error, data could be lost

Tobu is a freeform information organizer. It can be used to organize notes, todo lists, files, clips, code snips, diary entries and more or less any type of intformation that can be entered as text or stored in a file; its goal is to make very large number of items of information (hundreds of thousands or more) easily manageable, but its also well suited to managing smaller collections of data.
Tobu revolves around tagging each item of information and using filters to create lists of items, to sort and filter them further as needed; the aim of Tobu is to avoid organizing data as it is added and instead to limit the job of adding items to describing them with tags and sortable tags (more on that below), it is only when user is looking for data it is organized on the fly by filtering tags and sorting resulting lists.
Tobu has many functions which work in the ways that are not obvious. Therefore its highly recommended that you at least scan through the guide. In order to be able to use Tobu efficiently, you will need to understand the way of adding tags, using sortable tags, filtering and searching for a tag.
The optional topics that can be left off for later are templates, views and favorite tags. Keyboard shortcuts are not an afterthought in Tobu - they are carefully assigned to make the most important functions easily available without having to use mouse, you can look at them at any time by going to Help | Keyboard Shortcuts.
Tobu uses standard sqlite data file to store the database. Its stored in "data.db" in programs directory; you can use any tools that work with standard sqlite files to use it, in one of the upcoming versions of Tobu I will provide a script that will create linked html files or a plain text file out of the database, as well as in-program option to do the same for the current filtered item list.