Picturama is a very complete graphic editor, which is equipped with its own graphic viewer from which to view a multitude of formats, including the Photoshop PSD.
Picturama allows you to photographically retouch the photographs, resize them, rotate them, adjust them, add effects, filters, brightness, contrasts, etc., but without a doubt the most interesting thing is that it allows the conversion between different graphic formats such as PSD (Photoshop), GIF, JPG, PNG, TIFF, SGI, BMP, etc.
It is also remarkable that it allows you to create your own thumbnails galleries (thumbnails of the perfectly proportioned images).
You can free download Picturama 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.