I'd like to focus more on sales/landing clients...less on marketing tools. Is there a one stop tool/hub for managing all agency marketing needs?

I run a solo agency. While I enjoy online marketing, I have a barrage of tools I need to use and keep track of.

I wish there was a more streamlined hub that kind of does everything, so I can focus on landing clients and managing things from that one hub instead of 1000 different places. Does such a tool exist?