Best Free Comic Book Reader
Comix , a perfect reader for comic book archives saved in such formats as cbz, cbr, cbt, zip, rar, tar, tar.gz, tar.gz2 as well as normal image files, with support for various viewing modes, slideshow, magnifying glass, image scaling, dynamic background color, caching for faster page flipping, bookmarks, image enhancement, thumbnail maintenance, adding books to library, editing archives and more.
Best Free Desktop Publishing Program
Scribus , a professional quality page layout program capable of producing press-ready output. The feature list is impressive; basically everything you want is there including "CMYK color, separations, ICC color management and versatile PDF creation.
Graphics manipulation is handled via an interface to Gimp. Scribus can also import from and export to programs in the Open Office suite. The user interface is highly functional and the documentation is excellent, with lots of support from the user community. (Review)
Best Free Dictionary and Thesaurus
Artha , an off-line English dictionary and thesaurus application based on the extensive and in-depth database provided by WordNet, giving you word definitions and relative words such as synonyms, antonyms, derivatives, etc. Support for word look-up with a pre-set hotkey Ctrl-Alt-W, search using wild-cards like * or ?, and spelling suggestions.
Best Free eBook Reader
Best Free Notes Organizer
KeepNote , in each notebook, you can create folders and pages, as well as sub-folders and sub-pages, and you can re-organize them easily by drag-and-drop. In each page, rich text formatting including colored fonts, bullet point lists and hyperlinks are supported.
Not only can you store images, you can also directly insert a screenshot you take with this application into an opened note." (Review)
Tomboy Notes , time for it if you want to have a useful tool to relate notes and ideas together, with a wiki-like linking system. Features of the program include rich-text formatting, printing or exporting notes to html format, etc. (Review)
Best Free Office Suite
LibreOffice , a new office suite contains six feature-rich applications including Writer, Calc, Impress, Draw, Math and Base, supports for Open Document Format (ODF) and is compatible with other major office suites.
If you're already familiar with OpenOffice, you will be able to start using LibreOffice quickly and easily as it's a fork of OpenOffice.
Developed and supported by The Document Foundation, LibreOffice is aimed to be free and vendor-independent, with no requirement for copyright assignments.
OpenOffice covers the basics of office document creation: word processing, spreadsheets, presentations, graphics, a desktop database and allows you to save your documents in many choices of file formats so you'll have no problem exchanging documents with MS Office.
All of the modules are easy to learn and if you've ever used any other office software, it's a doddle. It is also extendable via extensions. (Review)
Best Free PDF Editor
Master PDF Editor , a PDF editor allows you to create and edit PDF files with features such as edit text, remove or insert images, add bookmarks and PDF controls, encrypt and protect PDF files, convert XPS files into PDF and more. This application also comes with editing functions for XPS files and is free for non-commercial use in Linux system.
Best Free PDF Reader
Okular , more than a viewer for pdf and other document formats including postscript, djvu, tiff, chm, dvi, xps, odf and so on. It can be used on both KDE and GNOME desktop environments, with features for annotations, highlighting, drawing lines and shapes, adding textboxes and stamps, selecting and saving a part of documents as text or in an image format.
Evince , a document viewer for pdf and other document formats including postscript, djvu, tiff and dvi, aiming to replace the multiple document viewers that exist on the GNOME Desktop with a single simple application.
Best Free PDF Tools
PDF-Shuffler , re-arranging pages in a pdf document, or merging and splitting pdf files, would be much easier with PDF Shuffler.
After importing one or more pdf files to PDF Shuffler, you are presented with pages in thumbnails so that you can easily merge, re-order or delete the pages, or right-click a thumbnail to rotate or crop a page before exporting to a new pdf file. (Review)
PDF Mod , besides the same functionalities as PDF Shuffler for reordering or rotating pages, and merging and splitting pdf files, PDF Mod comes with a clearer PDF viewer and a slider to adjust zooming levels easily. Even though it lacks a feature for cropping select pages, you get more other goodies such as exporting images, adding bookmarks and editing properties including the title, author, keywords and subject of PDF files. (Review)
Best Free PDF Writer
CUPS-PDF creates a virtual PDF printer to convert a file printed in queue to PDF and save it in a user directory.
Best Free Personal Finance
Best Free Personal Information Management
Evolution , a full-featured and comprehensive PIM that can syncronize with serveral protocols including Microsoft Exchange, providing users with integrated mail, address book and calendaring functionality. It has also been ported from Linux to Windows. (Review)
Best Free Project Manager
GanttProject , a very good project management tool with a surprisingly good depth of features and accessories—you can put in a percentage complete bar inside the timeline of that particular stage and make it easy to see how far along everything is without a lot of hassle. You can also add team members for a project and assign them to tasks when you set them up.
It also includes a Milestone feature giving an end goal to aim for with a fixed time. Many other project management tools do not support these. (Review)
Best Free Word Processor
AbiWord , easy to adapt to, especially since the interface is similar to that found in Word and WordPerfect. Its abilities include cut and paste, highlight, as well as the usual host of common formatting tools, annotation and checking spelling in many languages.
Besides being able to save to Word format, its own proprietary file format is available. A plugin can be installed to open OpenDocument formats. Sharing documents is possible with the integration of AbiCollab Web service. (Review)
FocusWriter , a distraction-free word processor lets you focus on writing with a hide-away user interface. This excellent cross-platform software runs in a full screen or a small window, features on-the-fly word counts, spell checks, customizable themes, and supports docx, odt, rtf and txt file formats. (Review)