Noty is a small note-taking application. It allows for small notes with formatting that can be organized into a tree-like structure and which also use internal hyperlinks.
nTodo is a small Gtk daily task and to do list.
nts is an acronym for Note Taking Simplified. It provides a simple, intuitive format for using plain text files to store notes, a command line interface for viewing notes in a variety of convenient ways and a cross-platform, wx(python)-based GUI for creating and modifying notes as well as viewing them
Odot is a task list manager that organizes your tasks hierarchically and emphasizes ones which are due.
Org-mode is a mode for keeping notes, maintaining ToDo lists, and doing project planning with a fast and effective plain-text system. Read more
piglet jotter is a tree data store, in the thread of kjots but using GTK. It stores an arbitrarily deep tree, with data stored in the same hierarchy in a single directory as plain text. It can handle exporting to HTML. It is simple to use, install, and modify.
Pygmynote is a command-line personal data manager (PDM) that allows users to store and manipulate heterogeneous data. It uses an embedded SQLite database for storing data.
PySnippy is a simple GNOME desktop application for managing your snippets online (at snipplr.com) and offline from an SQLite database.
PySubMind is a personal notes manager with organization based on tags. These tags are similar to those used in del.icio.us, flickr, or gmail.
PyTodo is a simple program for managing todo lists.
QTodo is a todo-list manager. It's based on Qt and designed to perfectly serve the user.
QuickList allows novice and experienced users to keep track of "things" without any help from a system administrator. "Things" can be anything, including (but certainly not limited to!) bug lists, phone lists, restaurants, team members, calendars, cool URLs, checkbooks, fishing holes, CDs, bunjee jumping cool sites, etc.
Rhinote is a simple Python/Tkinter script which provides virtual "sticky-notes" on your desktop. It's handy for jotting down quick notes or holding copied text that you plan to paste elsewhere later. Text can be cut, copied, and pasted; and notes can be saved (as plain text) and viewed and/or edited later, in Rhinote or any other text-editing application. While many such applications exist for virtually all computing platforms, Rhinote is extremely simple, lightweight, and "keyboard-friendly."
riot is a tool for keeping (textual) information organised. Some people call such programs 'outliners'. It is a todo list and note manager, and a manager for whatever information one might collect.
sh-todo is a minimal todo-list manager written in POSIX shell.
SiNotes is a simple desktop notes manager that allows you to create electronic desktop notes, search them in very convenient way, and display them.
tag-not-ed is a system that allows you to create and manage text documents by attaching tags to them.
Taskhelm is a graphical shell that sits on top of TaskWarrior, a TODO list manager.
Tasks is a simple To Do list application for GNOME, using libecal (part of evolution-data-server). Read more
Taskwarrior (formerly known as task) is a command-line to do list manager. It features tags, colorful tabular output, reports and graphs, lots of commands, a low-level API, abbreviations for all commands and options, multi-user file locking, and recurring tasks. Read more
Tasque is a simple but useful task management application (TODO list) for the Linux desktop. Read more
tdl is a to-do list manager. You can use it for keeping track of tasks you have to do, check them off as they get done, organise them into a project hierarchy, and generate reports of what you've completed over a period of time. It's often used for tracking programming tasks, but has also found various other uses.
The Board is a space for quickly placing daily records: photos, video, audio, text, and more. Think of it as a combination of a note-taking app, a photo and video booth, a photo album, a sketching board, and a digital scrapbook.
The Magic Notebook
The Magic Notebook lets you keep and organize notes. These notes can be almost anything--projects, contact information, to do lists, books to read, and assorted other things--and are available to you anywhere there's a networked computer.
TKDO is a CLI and PyGTK program designed to work with VimOutliner files. It takes all your todo.otl outlines, merges them into a single flat list, auto-sorts them, filters them, and adds support for things like contexts and recurring events. It also has a snooze button.
tmsu is an application that allows you to organise your files by associating them with tags. It provides a tool for managing these tags and a virtual file- system to allow tag based access to your files.
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 information that can be entered as text or stored in a file. Tobu revolves around tagging each item of information and using filters to create lists of items and to sort and filter them as needed.
ToDo Manager is a small cross-platform utility written in Python that is helpful in managing tasks that accumulate over time. It has a simple interface that doesn't take up a lot of screen space. It also has a simple plugin architecture that allows programmers to add new task sorting modes and file import/export routines to the application.
Todo.txt is a simple, command-line based task management tool for Linux. It consists of a small bash script and a configuration file. Read more
Tomboy is a desktop note-taking application for Linux and Unix. Simple and easy to use, but with potential to help you organize the ideas and information you deal with every day.
Tomboy Reminder Plugin
Tomboy Reminder Plugin is a GNOME plugin for Tomboy, a desktop note-taking application for Linux and Unix.
TuDu is a todo list manager in ncurses with a hierarchical representation of tasks. Each task has a title, a long text description, a deadline (tudu warns you when the date is close), and a scheduled date.
TuxCards is a hierarchical notebook that was created out of the desire to let my own chaos of papers, notes, and post-it's vanish.
w2do is a simple-to-use, yet efficient commandline todo manager. It can export to HTML 4.01 Strict and plain text.
WikidPad is a wiki-like notebook for storing your thoughts, ideas, todo lists, contacts, or anything else you can think of to write down. Read more
Wnotes are Post-It type notes for Linux and other systems with X Window System desktops.
Woody is a tree editor, also known as an outliner. It is similar to a text editor, but allows you to organize your information in a hierarchy. It also works as a todo list, and works well as a project management aid.
Wunderlist is a free, open source, cross platform application that can be used for task management and list making. Tasks are categorized into lists, such as a shopping list or a to-do list. Tasks can have completion dates and reminders. Read more
xmemo is an XWindow desktop memo program to send to and receive from the IPMsg, and the Oboegak.
XNotesPlus provides a mechanism for
manipulating on-screen sticky notes.
Xournal is a GTK+/Gnome application for notetaking, sketching, keeping a journal using a stylus on Tablet PCs and other platforms. It aims to provide superior graphical quality (subpixel resolution) and overall functionality. Read more
xpad is a virtual note-pad system for your X11 desktop. It transparently saves your notes for reloading later.
yaGTD is a very simple utility designed to make the management of your to-do list quick and easy.
Yank is a simple notekeer and todo-list manager using the gnome and gtk libraries.
Yoga is the GNU replacement for Lotus Notes. Yoga is being implemeted in Python and C++, tied together with SWIG. Until recently, the code was being done in Java, but it proved too slow without the ability to compile to native code. The database backend will be based on Berkeley DB.
Yokadi is a command-line oriented, SQLite powered, TODO list tool. It helps you organize all the things you have to do and you must not forget. Read more