GNU Aspell is a spell checker designed to eventually replace Ispell. It can either be used as a library or as an independent spell checker. Its main feature is that it does a superior job of suggesting possible replacements for a misspelled word than just about any other spell checker out there for the English language. Unlike Ispell, Aspell can also easily check documents in UTF-8 without having to use a special dictionary. Aspell will also do its best to respect the current locale setting. Other advantages over Ispell include support for using multiple dictionaries at once and intelligently handling personal dictionaries when more than one Aspell process is open at once.
GNU TeXmacs is a free wysiwyw (what you see is what you want) editing platform with special features for scientists. The software aims to provide a unified and user friendly framework for editing structured documents with different types of content: text, mathematics, graphics, interactive content. TeXmacs can also be used as an interface to many external systems for computer algebra, numerical analysis, and statistics. New presentation styles can be written by the user and new features can be added to the editor using Scheme.
GloboNote is a desktop note taking application. It helps you to create to-do lists, reminders, and other notes in one place. There is no limit in the number of sticky notes you can create. Notes can be organized by groups and searched using the search tool. You can format a note's text, change its color, font, size, and transparency level. You can make a note sticky by setting it to always stay on top, or hide or roll-up a note when not use. You can set alarms, play custom alarm sounds (WAV, MP3, AIFF, and AU), attach files, insert images, and more.
Notes/Tasks is a GTD compatible multi-platform note and task manager. The focus is on quick, intuitive access to any note or task by project or full text search. It features synchronization with notestasks.com, giving you free access to your notes and tasks from anywhere via the Web.