DiTAA

If you're looking for a free, open source software that can assist with diagram creation, then ditaa may be just what you need. This small command-line utility is written in Java and can easily convert ascii art into high-quality bitmap graphics.

While ditaa handles ascii art exceptionally well, it goes beyond basic line drawings by allowing users to add special markup syntax to create complex shapes and symbols. This gives users even greater control over their final diagrams.

Overall, ditaa is an impressive tool that makes diagram creation a breeze. It's simple to use and its open source nature ensures that it will continue to evolve and improve over time.