While it does have a couple of shortcomings, the Philips Room to Room Docking Speaker (DS3205) is an attractive little iPhone 5 speaker dock that sounds good for its size.
The Memorex Travel Speaker offers a compact, foldable design and some handy extras, but the so-so sound quality and cheap plastic construction will likely be a turnoff for some potential buyers.
The Vestalife Ladybug is a suitable choice for iPod owners who want a stylish and reasonably compact portable speaker that can also be used in a dorm room or office.
Pricing not available
The aptly named Amplifi has a singular purpose--getting your iPod to really crank without putting a hole in your wallet.