This document has several variations, read the following descriptions to select the right document for you.
Single Member
Free
This is an operating agreement for an LLC with only one member (owner).
Manager Managed
Free
This is an operating agreement governing the operation of an LLC that is managed by a manager (person or entity) rather than some or all of the members or owners of the company, which would be a "member-managed" LLC. This version is meant to include a "Joinder Agreement - LLC" as an exhibit to the agreement.