Downloading Appacity 1.1.0.0 from our website was free. This free software is a product of AIZO. The program is included in Desktop Tools.
From the developer:
'Appacity' is a free Opacity changer for Windows. Appacity will scan for open Windows and list them. The user then can select the Window and change the Opacity on a 0-100 scale. Appacity is freeware. Appacity is very light with only ~2MB. It also features an Automatic Updater which can be also turned off in the settings. Appacity has an Opacity limit by default, so cant accidentally make Windows completely invisible.
You may want to check out more software, such as Virtual Screen Maximizer v.0.2.1, DigitArchive or Desktop Video Reader App, which might be related to Appacity.