Scan in the barcodes on all of your media to DiscCat to keep track of what you have to prevent duplicate purchases.
DiscCat is a simple catalog for DVDs, Games, Books, or whatever else you would like to keep track of.
Can store cover images, IMDB links. Has Wishlist & Rental tracking.
There is a feature for attempting to look up DVDs based on the barcode online. I cannot stress enough that this *will* fail on a large proportion of your discs. Please do not download expecting to not have to type anything in, as you will likely be disappointed.
Barcode scanning is all performed by whatever barcode scanning app you have installed. I recommend the app 'Barcode Scanner' by ZXing Team - this is the app that will be installed if you do not have a scanner already. Any issues with scanning barcodes (this includes strange things happening when you press buttons while scanning) are entirely due to whatever barcode scanner you have chosen to install.
CD titles are displayed in the order you typed them in - if you type in the artist followed by the title, that is how it will be displayed - I have no control over this.