cd/dvd/bd emulator and ISO mounter
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WinCDEmu Portable can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the PortableApps.com Platform for easy installs and automatic updates.
WinCDEmu is an open-source CD/DVD/BD emulator - a tool that allows you to mount optical disc images by simply clicking on them in Windows Explorer. It supports one-click mounting of ISO, CUE, NRG, MDS/MDF, CCD, IMG images and an unlimited number of drives. WinCDEmu does not occupy a drive letter when not in use. Data, DVD-video and BD-video images are supported.