You handiest friend probably already has his toolbox figured out, but a portable multi-tool is ideal for on-the-go, spur of the moment DIYing. Leatherman makes a ton of different options, but the Rev is affordable while still offering 14 different gadgets. Made in the U.S.A., Occidental Leather makes the best work belts, hands down. You can opt to gift one of the pricier, full-belt options, but when in doubt, this clip-on works wonders to store tools he needs within arm's reach.
This kit contains 41 of the most commonly used tools for most mountain bike maintenance, including a cassette tool, chain breaker, Allen wrenches, crank puller, bottom bracket remover, and most other tools needed for keeping your mountain bike out of the shop and on the trails.
Every renter and homeowner should have a few basic tools in their toolkit for quick fixes. Need to swap out an outlet cover, hang a picture frame, or tighten a loose drawer pull? You'll want a screwdriver, hammer, level, and wrench for that, respectively.