First things first, I've done the brief introductory video:

And for this, I've made several modifications to the page.

A big modification was for the code generator, which simply used a silly-looking regular expression. That temporary solution is now replaced with a template library. More advanced code generation can be done now, the real fun begins!

Next steps

• Start writing documentation for the JSON file formats. These store the MCU core, peripheral and module information in a human-readable style.
  The documentation will be available on Github Wiki of the page.
• Add sanity checks so the tool can give warnings and errors instantly. Maybe also information like: "You may need external pull-up resistors for the I2C pins"
• Start making an editor page where everything can be edited visually, instead of writing the JSON manually. Will speed things up. As it is a big sub-project, it won't be available in the near future.
• Concentrate on the Arduino Pro Mini's all features, try to make at least the Arduino code flavor fully working, so it could be used as a base for others.
• Think about some small project (ore more than one) which could be done with this tool. Example use-cases can show its potential.