Mike @ jaxcoder.com has published a Beta version of his Electronics Parts Inventory System for Windows OS:
The Windows Hobbyist Electronic Inventory System or WinHesit is an electronics component organizer on steroids that was developed with the electronic hobbyist in mind. Designed to be light weight, responsive and most of all easy to use it also allows a lot of information to be optionally entered for those that need to store more data that is to be associated with the component.
WinHeist can be used right out of the box or customized to work the way you work. A database of common parts is provided to get you started but configuring the application to your specifications is easy and once configured the settings can be saved so that all future DBs can use the same settings.
Hobbyist Electronic Inventory SysTem – [Link]