Once you've applied for your personal consumer cards, these will help move that credit line upwards. The goal with these cards, is to gain a high credit line, and then move that money over to your cards that offer free transfers.
I have rated them based on the criteria I feel is most important, including transfer fees, estimated credit limits, card perks, etc.
These cards offer great rewards just for signing up, and will make you a load of extra cash when transferred to your free transfer cards. They also offer very easy approvals for the most part, so go wild.