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.
Keep purchase workflows moving after suppliers sign agreements.
Keep purchase requests moving after suppliers sign. Your confirmation form records the signed agreement link and closes the signature step.
Keep vendor proposal reviews moving with a logged request for each file.
Your reviewer gets a request for a decision, while the proposal item shows which file went out and when.