English: This chart shows the most popular open-source licenses in 2021 according to mend.io. In order of most to least popular they are the Apache License, the MIT License, the GNU General Public Licenses, the BSD licenses, the GNU Lesser General Public License, and the Mozilla Public License. Many other licenses were used according to their study but no other licenses rose above a 1% usage share.

Summary: https://www.mend.io/resources/blog/open-source-licenses-trends-and-predictions/ , whitepaper: "The Complete Guide for Open Source Licenses 2022".

The chart includes the feather glyph from this file: https://commons.wikimedia.org/wiki/File:ASF_Logo.svg licensed under the Apache License, Version 2.0, copyright © Apache Software Foundation. You may obtain a copy of the License at https://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.