1)   Advanced Registry Optimzier 5.1
Advanced Registry Optimizer is an advanced registry application which keeps Windows registry clean and compressed to keep your system smooth, fast and error-free.

 2)   WinClean Pro 1.00
WinClean Pro is the bundle of many utilities which are available in a single product. It will make your system run in a smoother, faster and error-free manner in addition to maintaining privacy and securing your system.

 3)   Basic Electrical Troubleshooting 2.50
Basic electrical training - troubleshooting circuit simulation CBT with lighting circuit example.