Recs.
Updated
The editor works online with github, just follow the link above, you can also download it for yourself and run it on a local server, for example on node.js
English version (under development): https://github.com/Sergey123Ovechkin/collagen_2_en
In the editor, you can cut, process parts of images, create sprites, collages, draw, add text, save sprites, compress and stretch parts of images, work with color, create masks, also supports working with layers, there is a grid for convenient positioning, supports Internet fonts such as Google fonts. Also added the ability to create puppet images (skeletal sprites).
The editor is modular, which allows you to write additional functionality in javascript yourself and download it directly from your github repository.