wanderingdan

The ChangeCrab wordpress plugin makes it easy to add the embed code to your website for showing the ChangeCrab widget on any given URL.
You will require a free (or paid) account at ChangeCrab.com for the widget to work.

ChangeCrab

The ChangeCrab wordpress plugin makes it easy to add the embed code to your website for showing the ChangeCrab widget on any given URL.

ThemeZee

The WP Theme Changelogs plugin allows you to view the changelog before updating a theme, very similiar to the available changelogs for plugins.
<h4>How does this work?</h4>
The plugin parses the readme.txt of the theme to get the changelog details. In order to work, your theme must have a valid readme.txt including a changelog section.

WP Theme Changelogs

Hace lo que promete. Ojalá pronto sea obligado poner los changelogs en archivos readme.txt en el directorio de temas.

Y sino que se incluya esta funcionalidad en el núcleo de WP

Funciona perfecto

Adding changelogs for themes hosted on wordpress.org by parsing their readme.txt

ChangeCrab vs WP Theme Changelogs