In the old days they had toolknives made in England for farmers and outdoorsmen. Some were large with several blades and stag handles.  Besides the main blade for general cutting then there are other blades like a saw, screwdriver, awl, corkscrew etc. they also made small gentlemen’s knives with multiple blades and mother of pearl handles. Then the Swiss Army knives are famous for their tool  knives with their red plastic handles and white cross. They have many models from small gentleman’s knives with pen blade, nail file, toothpic and tweezer up to one called the champion which has many blades including scissors, file, Phillips and straight edge screwdrivers, corkscrew, hook, awl, etc. some models now include tiny flashlight, and even some computer tools. Leatherman is a big name now in tool knives that follows the larger pliers and folding handles formula. They also offer many options and models and materials including titanium. Other companies like Gerber in Portland Oregon has a gravity powered pliers that flips out when you thrust the handle forward so you don’t have to unfold the knife as on other brands.  Buck had one also called Bucktool but it’s been discontinued. Schrade had one called Tough tool but it’s also out of production.  Kershaw also had one but it’s been dropped also.  Another good on is by SOG and it offers a ratcheting plier for extra grip.  There are also lots of copycats made in Asia now with lower prices.  Another important thing to consider is guarantees by manufacturers. I have experience with Buck, Gerber and Leatherman , and Kershaw and found them to be very nice to work with. They will usually fix or replace your knife with no hassle.  Some old time knife companies have struggled to stay in business in recent years and have been bought out and moved to China.  Schrade for example is one and they still made the original models but use stainless steel now instead of carbon steel like the original U.S. made knives. They have added many new models also.  The way to tell the original from the Chinese made is on the original blades are marked Schrade U.S.A.  The new ones just say Schrade.