nip2, the "free love child of Photoshop and Excel," is the GUI of vips. You don't directly edit images --- instead, like a spreadsheet, you build relationships between objects. nip2 actively manages these relationships: if you change an object property, the change is propagated "spreadsheet-style."
Like vips, nip2 is fast and needs little memory. You can comfortably work with multi-gigabyte images on very modest hardware.
In addition to the visual programming interface accessible through the GUI, nip2 has command-line and batch modes. It even has its own functional programming language (for writing extensions).
These details are provided for information only. No information here is legal advice and should not be used as such.