Not a tool, but something very interesting from the 2014 National Hardware Show.

At the National Hardware Show iKeyless showed their new Universal Car Remote. The company says it works on 1,080 vehicle models equipped with a factory keyless entry system manufactured between 1995 and 2014. This new single remote replaces 160 OEM keyless entry remotes. Because iKeyless is the world’s largest retailer of replacement keyless remotes, they said they’ve taken the best of all those designs and created a superior product compared to OEM factory remotes. The iKeyless Universal Car Remote is customer programmable for 100% of the vehicles it’s compatible with. A comprehensive compatibility chart is available at the company website, link below. Setup is simple -­ similar to that of a universal television remote. No technical knowledge or tools are needed to program/pair the device. But if you need help the iKeyless support team is available 24/7 via the toll­free help line. On their website, they describe procedure to pair the Universal Car Remote with your compatible vehicle: “Insert the key into the ignition. Turn it from off to ACC eight times. Then, within 20 seconds push any button on the Universal Car Remote. Turn the ignition to off and pairing is complete.” The $49.95 MSRP is about half or even less than retail customers will probably have to pay for a replacement from their dealer. 

http://universalcarremote.com/