Todomoo
Todomoo is a todo manager specially designed to help you manage paid projects.
22 Alternatives To Todomoo
CintaNotes
CintaNotes is a note taking application for Windows.
Free DocusTree
Organize your documents, webpages and more in a tree structure - DocusTree
Google Tasks
to-do list app that integrates with Gmail and Google Calendar
Indigrid
Plain text outliner with side-by-side views.
KeepNote
KeepNote: note-taking and organization.
MemPad
MemPad is a plain text outliner and note taking program with a structured index.
Mikidown
A note taking application, featuring markdown syntax.
My Notes Keeper
Home Of My Notes Keeper - My Notes Keeper is the premier note/outliner application for Windows 9x/2000/XP/NT. It allows you to store all of your notes and information in an easy-to-use outline, where you can quickly find what you need.
NixNote
Unofficial Linux client for Evernote.
Notezilla
Colorful & powerful sticky notes app for Windows & Phones.
Org mode
Org: an Emacs Mode for Notes, Planning, and Authoring
RedNotebook
RedNotebook is a software that format, tag and search entries and add pictures, links and customizable templates, spell check notes, and export to plain text, HTML, Latex or PDF.
Remember The Milk
Remember The Milk is a task and time management application for mobile devices.
RightNote
Advanced notes and information manager for Windows
SwissTasks
SwissTasks shows due items such as notes, emails, calendar events and things to log in one list.
Task Coach
Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
Taskade
Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.
ToDoList
Windows desktop application to stay on top of your daily tasks.
Todo
Todo is a to-do and task list app.
Toodledo
Toodledo provides a set of tools to increase the productivity.
TreeDBNotes
Freeware Personal Information manager, Notes organizer, Document manager software and Information System, Lecture Notes management
TreeLine
TreeLine just stores almost any kind of information.