What kind of services do travel agencies provide other than group tours?

They provide full service for any kind of travel you want. If you want to take a trip to Europe, Asia, or even just to another state, they will make all of the arrangements for you, including travel arrangements, hotel, and other services, as well. They can also find the best rates for you on plane fare, hotels, etc., and help you with your itinerary. Also, if any problems arise with the plane or hotel, etc., they can help get them resolved. I highly recommend using a travel agent, especially for internation trips, whether travelling with a group, one or two other people, or by yourself.