No, this has nothing to do with financial advice.... People are taking notice of SurvCo's new Credit Card Ax. While it is fairly unique to have something that can be turned into a hatchet be the size of a credit card, there are too many multi-tools to mention that fit that dimension. Indeed, you could easily end up needing a second wallet if you got them all!
ReadyMan has an interesting break-apart version (shown on the right) which they are giving away for "free", plus shipping and handling. They do have a video showing you how to use it they send a link to you when you order. Of course, they do try to get you to sign up for a monthly membership in their organization.
One of the oldest and probably one of the best values is the 11-function one on the left. I've had it so long I've forgotten where I put it! It's hardly worth buying by itself, the shipping is more than the cost of the item. My guess is any patent protections have run out, that's why there are so many inexpensive copies.
To my eyes, one of the sleekest of the genre is the Wallet Ninja. Having a Phillips screwdriver is unusual in itself for a credit-card survival tool, but I think the function I would use most is the box cutter/letter opener; that's what I wish I had on my Gerber shard. Interestingly, while I've never tried them yet, KnifeCenter lists 30 items in this category (although a number only differ by color), some of them quite pricey.
Perhaps the most whimsical of the entire bunch is the PocketMonkey. At only 1 ounce and 1 mm thick, I don't expect it to be the most durable, but it might just be the most convenient to carry around -- they even say it is TSA compliant!