GaryK - 6:50 am on Nov 23, 2012 (gmt 0)
A quick query — basically anything without Mozilla or Opera at the start of the string — of my user agents database returns just over 19,000 similar types of user agents to the ones you posted. There's a lot of weird ones out there including everything from the hilarious to the obscene! I'd try to copy/paste them, but I'm afraid the forum software would suffer a total meltdown! :)
I think the best one, from January of 2000, is both funny and obscene: none of your f****** business!