PaletteWB 2.0 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This program is a product of Daniel Krajzewicz Software. We recommend checking the downloaded files with any free antivirus. The software is categorized as Photo & Graphics Tools.
From the developer:
PaletteWB is an application for converting palettes between different formats. It currently supports the following formats: GIMP palette (*.gpl), Adobe Photoshop palette (*.aco), Fractint palette (*.map), Microsoft palette (*.pal). Each of these formats can be used as input and the read palette can be written in one of these formats. Additionally, PaletteWB can render palettes to .gif-files and export palettes to JavaScript, css, and HTML.
You may want to check out more software, such as Montagne, ImageVisu or PP3 Private Album, which might be similar to PaletteWB.