JetBrains Mono is a free, open-source monospace typeface specifically designed for developers. It features increased letter height for better readability, distinctive character shapes to avoid confusion (like differentiating '1', 'l', and 'I'), coding ligatures for common operators, and support for 148 languages. The font includes optimized italic variants with a 9° angle and comes pre-installed in JetBrains IDEs since version 2019.3. It's available under the SIL Open Font License 1.1 for both commercial and non-commercial use.