Gliffy

Gliffy's diagramming software allows any team to visually exchange ideas and, according to its own claims, is already used by over 16 million users. The interactive diagram creator gives users the ability to switch between layers and information in the diagram viewer and create graphics via drag and drop. Gliffy diagrams can also be integrated into a company's existing tool environment. Gliffy can be tested free of charge for 2 weeks and is available in two price variants: Professional and Enterprise. Prices start at $8 per month per user when billed annually and is limited to up to 9 users.