Kuretake's Zig White Calligraphy Ink is known to be truly white than many other brands in the market. Used mostly for correction or as highlights. Once it is dry, it becomes waterproof.
Moblique - 2-in-1 Penholder - Purple Sand
Moblique - 2-in-1 Penholder - Silver Storm (Chrome)
Kuretake Zig H20 Detailer Water Brush Fine
Pentel Aquash Waterbrush Fine/ Medium
Sakura Koi Brush Pen (48 individual colours)