Google Contacts, the address book built into Gmail, lets you keep track of all your contacts, see when you last interacted with them, and more.
Draft client answers using approved account details and email history.
Get a reply draft in the original conversation, with the sender's questions addressed and uncertain facts marked for your review.
Send client agreements for signature and track their signed copies.
Your client gets the signature request, and your team finds the signed agreement with its audit page in the final folder.