JIIcons is an open source project, this page shows the details of how JIIcons is licensed.
The JIIcons fonts is licensed under SIL OFL 1.1.
which allows the font to be used, studied, modified, and redistributed freely as long as it is not sold by itself. The font can be bundled, embedded, redistributed, and sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives cannot be released under any other type of license.
The JIIcons CSS, LESS, and SASS files are licensed under the MIT License.
which allows the software to be used, copied, modified, merged, published, distributed, sublicensed, and/or sold with any software, subject to certain conditions.