Open Meteo, https://open-meteo.com/.
Open-Meteo is an open-source weather API with free access for non-commercial use. No API key is required. You can use it immediately!
Less features than OpenWeatherMap (https://openweathermap.org/), but 100% free.
Bobinas P4G is a social network. It runs on GNU social, version 2.0.1-beta0, available under the GNU Affero General Public License.
All Bobinas P4G content and data are available under the Creative Commons Attribution 3.0 license.