Ho-ho-ho, people! Time to rack your brains to come up with cool gifts for the tech nuts in your life. Most “holiday tech gift idea” lists are full of suggestions like “iPod Touch, $300” or “Surface tablet, $500.” Really? Hundreds of dollars? Beyond your parent/child/love interest, how many people on your list really get that kind of outlay? What the world really needs are cheap gifts that real-world people can give to real-world friends, bosses, employees and family members. One offbeat tech gift idea a day — and nothing over $100, David Pogue reports for The New York Times…