Dia

Dia is an open-source diagramming application that is part of the GNOME project's suite of software. It is designed to create diagrams of various kinds, including flowcharts, network diagrams, and database models. Dia aims to provide users with a versatile tool for visualizing and managing complex information. It supports a variety of diagram types, offers a wide range of shapes and tools, and allows for exporting diagrams in multiple formats.