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Pro Allows creating ambiance
CreaWriter's main selling point is the fact that it adds atmosphere to its workspace. By default there's a background with a sunset over water and a sound of trickling water, but the background and sound can be changed to anything to create the desired atmosphere.
Along with background and sound, CreaWriter has options for customizing transparency, font size, family and color, status bar information and visibility, etc.
Pro Exports to txt, rtf and doc
When saving a file, CreaWriter does not offer any options, but manually adding an extension will allow exporting to txt, rtf and doc formats.
Pro A free edition is available
If you just want to test the software out or don't need the extra features, a free version is available for download on the official site. A paid version with added functionality is available to donors (5 EUR and up).
Con Windows only
Con The free version is somewhat limited
The paid version adds useful feature such as word count, text styles (bold, italic, underlined), hotkeys, autosaves, ambient sound volume and customization options such as configurable text color, text areas's color, size, position and transparency, and adjustable ambient sound volume.