Online at [ http://www.spritemate.com/ ], code at [ https://github.com/Esshahn/spritemate ].

Originally shared by Kam-Yung Soh

Online at [ http://www.spritemate.com/ ], code at [ https://github.com/Esshahn/spritemate ]. "Ingo Hinterding, known as “Awsm” on CSDb has released his browser-based sprite editor for the Commodore 64 – Spritemate.

Since it runs on any modern browser, Spritemate can be used on Mac, Windows, and Linux (or virtually any device that has a browser that supports Javascript). It also supports the most common file formats for the Commodore 64."
http://www.vintageisthenewold.com/new-online-sprite-editor-for-the-commodore-64/