Free - Eterlogic Software

VSPE is intended to help software engineers and developers to create/ debug/ test applications that use serial ports. It is able to create various virtual devices to transmit/ receive data, share physical serial port data for several apps, and so on.
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$179.95 - ELTIMA GmbH

Virtual Serial Port ActiveX control creates a virtual port and lets you view and control any data sent to virtual com port by other applications and respond to them by sending your own data to virtual port. Offers full software serial port emulation.
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$29.95 - Paragon Software Group

Get up to 23 virtual CD/ DVD-ROM drives and unlimited number of virtual CDs/ DVDs. Create the images of all needed discs and work with several CD/ DVD-based appliapplications simultaneously or burn these images to clone CD or DVD.
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$29.99 - FarStone Technology

Virtual Hard Drive Pro creates a RAM drive, which functions like a physical hard drive, only with much faster access rates. A RAM drive bypasses the system hard drive, which is the slowest part of a computer, to give your system an immediate boost.
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