Objects are defined as real-world entities that refer to instances of classes. An object diagram demonstrates relationships between the instantiated classes and the defined class in the system.
An object diagram is represented by rectangles, and consists of objects and links, where the links are used to connect the objects. You can quickly visualize your idea on the conceptual level using Gleek.
Gleek uses an informal UML diagramming language with its own syntax. If your goal is to create perfect object diagrams, Gleek might not be for you. If your goal is to communicate the idea, Gleek will help you quickly generate diagrams during a meeting or when collaborating.