Stereo by name, stereo by nature, bx_stereomaker is an amazingly useful upmixing tool that allows users to easily add pseudo-spatiality and width to mono source-recorded tracks like guitars, vocals, and room mics, while balancing the centre of the stereo signal and paying particular attention to its frequency range.
Available in 64- and 32-bit versions, Brainworx's bx_stereomaker plug-in can be purchased and downloaded (in all Mac OS X and Windows formats — VST 2.4, VST 3, RTAS, AU, AAX) for an introductory price of $95.00 USD until September 15 (rising to $129.00 USD thereafter).