of December 2018, Liberation Fonts 2.00.0 and above are a fork of the ChromeOS Fonts released under the SIL Open Font License, and all fonts are developed at GitHub. Older versions Red Hat licensed these fonts from Ascender Corp under the GNU General Public License with a font embedding exception, which states that documents embedding these fonts do not automatically fall under the GNU GPL. As a further exception, any distribution of the object code of the Software in a physical product must provide the right to access and modify the source code for the Software and to reinstall that modified version of the Software in object code form on the same physical product on which it was received. Thus, these fonts permit free and open-source software (FOSS) systems to have high-quality fonts that are metric-compatible with Microsoft software. The Fedora Project, as of version 9, was the first major Linux distribution to include these fonts by default and features a slightly revised versions of the Liberation fonts contributed by Ascender. These include a dotted zero and various changes made for the benefit of internationalization. Some other Linux distributions (such as Ubuntu, OpenSUSE and Mandriva Linux) included Liberation fonts in their default installations. The open source software LibreOffice, OpenOffice.org and Collabora Online included Liberation fonts in their installation packages for all supported operating systems. Due to licensing concerns with fonts released under a GPL license, some projects looked for alternatives to the Liberation fonts. Starting with Apache OpenOffice 3.4, Liberation Fonts were replaced with the ChromeOS Fonts – also known as Croscore fonts: Arimo (sans), Cousine (monospace), and Tinos (serif) – which are made available by Ascender Corporation under the Apache License 2.0. Unsupported features Unlike modern versions of Times New Roman, Arial, and Courier New, Liberation fonts do not support OpenType advanced typography features like ligatures, old style numerals, or fractions. See also Typefaces Croscore fonts – fonts which formed the basis for Liberation fonts Droid – a font family by the same font designer Gentium – an Open Font License font which defines roughly 1,500 glyphs covering almost all the range of Latin characters used worldwide Linux Libertine – another free software serif typeface with OpenType features support Nimbus Roman No. 9 L, Nimbus Sans L and Nimbus Mono L – another series of free software fonts also designed to be substituted for Times New Roman, Arial and