I have one of these, which works for a lot on the bike, stem, handlebars, brakes, seat clamp, etc.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

For the rest I have various click type torque wrenches, and a beam wrench. I have found the torque wrenches from Kobalt are nice, and have them for different torque ranges. They can be found at Lowes.