Here are a bunch of examples:
http://www.botsvsbrowsers.com/listings.asp?search=asktbtrl
I would've guessed an Ask.com-related bot, but apparently not according to their FAQ.
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Your link says it's AskTbTRL2 btw. – user2483 Nov 19 '11 at 8:51
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A quick google search shows that it's the user agent for the ask.com toolbar.
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Ah, I'd been googling "AskTbTRL" which revealed nothing. Adding "2" to the end did the trick. Thanks – mcqwerty Nov 19 '11 at 16:13
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I didn't add the two to the end and I still gt the correct result. You should try actually clicking on some of the results next time. – MarkM Nov 19 '11 at 16:50
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And you should try looking up the word "nothing". Google gives different results to different users. In my case, there were zero results returned. Thanks anyway for the pro-tip. – mcqwerty Jan 16 '12 at 19:22
