Is there a simple software that would let me categorize, tag and search items that I input in it? It would be like a regular database but with a simplified GUI.

I would add items with meaningful description and then categorize them and add tags. Then I would like to search (preferably real-time i.e. the search is showing results as I am typing) based on the item name/description, category or tag. The other option would obviously be that I just click the category or tag and it lists all the relevant results. List of categories and tags would also be a nice touch.

Software is needed for Windows 7 or 8 or it can even be a Web app.