jrnl.vim is licensed under the Apache 2.0 license (see below). These are the same terms as Neovim, and is compatible with the Vim license.
Copyright © 2020 Jonathan Wren jonathan@nowandwren.com
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://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.