MoneySupermarket

Search between over 230 cards in the following categories: 0% balance transfer and/or new purchases, cashback, lowest balance rate transfer rate for life, no balance transfer fee, low standard rate, loyalty/reward, foreign usage and pre-paid cards.

Guides are of a high quality and include the Pre-Paid cards that allow you to load cash for spending at retailers or for paying bills (more debit than credit card). You can also register for credit card alerts.

With its innovative Smart Search tool, this is site is useful for finding credit cards.