Free-Ink-Brushes-for-Photoshop by BrittneyMurphy on DeviantArt
Inks 02 - Photoshop Ink Brushes - GrutBrushes.com
Amazon.com : Craft 'n' Beyond Calligraphy Brush Pens Pack of 3 Small, Medium and Large Markers for Hand Lettering, Art Drawing, Sketching, Scrapbooking, Journaling - Beginner Kit with Fadeproof Black Ink :