Open Source To-Do Lists Software

PNotes is light-weight, flexible, skinnable manager of virtual notes on your desktop. It supports multiple languages, individual note's settings, transparency and scheduling. Absolutely portable as well - no traces in registry. PNotes.NET edition requires .NET framework 4 Client Profile

pin 'em up is a tool for placing small notes/post-its (e.g. TODOs/Reminders) on your desktop and organize them in various ways (categorize,hide,upload,export,...). Due to platform independence, the notes can also be shared on different operating systems

Whatever is a lightweight unofficial Evernote© client for Linux desktop. Whereas Evernote Corporation still doesn't support Linux platform, there's a need to piece it out. Using a web version can not always be comfortable, therefore there's nothing that can be more useful than a desktop client. Whatever is built with Electron. It provides wide enough integration with desktop, such as dock and tray icons and background working mode. Withal, it affords all functionality that is represented in the web version.

A small sticky notes application

EN: Free Sticky Note in java 1.6+ for Desktop; I T: Free Note per il tuo Desktop compatibile con java 1.6+; 3F Java Notes is a free and open source program that will allow to place lots of sticky notes on your desktop so that you will never forget about

AsmPlan is a small, fast todo program optimized for cyclic events. It handles daily, weekly, or yearly events.

BasKet Note Pads is an all purpose note taking application that let you take every kond of notes while remaining unobtrusive.

BlockNote is a simple and good-looking program specially designed to help you keep track of notes and reminders. Notes can be stored either in list form, or in tree-like structure (which supports HTML functions). Also there is a "countdown" feature

BrainDump is a hierarchical note-taking application written in C#. It is similar to TreePad, JTreePad, and other Tree-like note-taking applications.

Gnome-Todo-Manager is a lightweight tool for tracking todos with a notification mechanism. Other features include repetition, grouping and prioritizing the todos. It is written in Python/PyGTK and uses SQLite as its backend.

Helper is an integrated PIM and social networking (blog, RSS, foaf, etc) client. Allows to store, annotate and navigate information uniformly by means of folders, tags and categories. Based on OWL, Eclipse RCP and open standards (Dublin Core, foaf, etc).

Imbolc is a client application of the OpenGroupware Coils collaboration server for managing tasks and to-do lists. Imbolc supports off-line operation and synchronization via Coils' JSON-SYNC protocol.

This Program is a Personal Information Manager and will show your appointments, tasks and notes on your desktop wallpaper.

KnowIt is a simple tool for managing rich-text notes in a tree-like hierarchy.

Motive One is an application to help you follow David Allen's Getting Things Done task-management methodology.

NoMemory is a simple Mono/GTK# to-do list.

This KDE Plasmoid shows tasks (or in the naming of *.ics files, TODOS) from calendar files. It was implemented to show tasks from the iPhone reminder app, but it should work with other calendars, too.

Shows a window with reminders at desktop start-up. Reminders are displayed a few days in advance. Allows also to enter some things to do, which are displayed together with reminders.

Got a ton of little yellow (Post-it) notes on your monitor? Snotes provides a way of having little note windows on your desktop. Similar to knotes, but without the KDE-connection and more configurable.

Minimalistic and powerful task manager for gnome.

Thoughts will end up being a task management application for the KDE desktop. It will evolve from it's current state as a plasma runner for the todo.txt format to a full fledged application.

collection of small useful utilities

A small no-nonsense personal digital organizer written in GTK2, featuring appointments, todos and notes. It uses iCalendar files as it's native backend, supports multiple alarms per appointment/todo and has recursive todos.

uberNote is a note taking application - to help you organize your thoughts, your memory, and maybe even your life.