We also used email, as any group these days would, to organize meetings and delegate responsibility when we couldn't all meet at one time. It seems that email is an almost necessary part of any group work as it is hard to find time to meet in our difficult and busy schedules at school.
Other software such as Adobe Photoshop, Illustrator, and InDesign helped us to create professional looking examples, images, and diagrams to better convey the message of our proposal to our clients. We were also able to create a very cohesive layout and design that brought our entire project together really nicely.
Overall, technology was a necessary part of our group work. We could have probably done without some of it, but this would certainly have hindered our progress.