RuneScape Grand Exchange
I made this application for me to use but I no longer play RuneScape, what it does is it loads a list of items from a website and then displays them when you being typing into the search box.
When you find the item you want if you double click it another form will appear and you can then view graphs and prices. I found it much faster than going to the RuneScape website everytime I wanted to find the history of an item.
If you click on an item that isn't in the grand exchange database the program will tell you so don't worry about it crashing!