The feed and blog icon are Oxygen Icons and can be freely copied under the terms of the LGPLv3.
The other sidebar icons are the favicons from the respective websites, and are copyright of their respective owners.
alaCarte is a modern, easy-to-use tile renderer for OpenStreetMap data. It supports multiple MapCSS stylesheets at
once which can be updated at runtime, and it does neither need an external web server or an external database.