Arimo is a part of the Chrome OS core fonts. The Chrome OS core fonts, also known as the Croscore fonts, are a collection of three TrueType font families: Arimo (sans-serif), Tinos (serif) and Cousine (monospace). These fonts are metrically compatible with Monotype Corporation’s Arial, Times New Roman, and Courier New, the most commonly used fonts on Microsoft Windows operating system, for which they are intended as open-source substitutes.
Google licenses these fonts from Ascender Corporation under the Apache License 2.0.
The fonts were originally developed by Steve Matteson as Ascender Sans and Ascender Serif, and were also the basis for the Liberation fonts licensed by Red Hat under another open source license. In July 2012, version 2.0 of the Liberation fonts, based on the Croscore fonts, was released under the SIL Open Font License.
Arimo was designed by Steve Matteson as an innovative, refreshing sans serif design that is metrically compatible with Arial™. Arimo offers improved on-screen readability characteristics and the pan-European WGL character set and solves the needs of developers looking for width-compatible fonts to address document portability across platforms.
Updated in May 2013 with improved hinting and released under the Apache 2.0 license.
Design: Steve Matteson
License: Apache License, Version 2.0
You may very well use latin Arimo as a replacement for Arial Latin — but it is not the case if you need Cyrillic.
Mikhail Strukov, Ilya Ruderman, Yury Ostromentsky: Cyrillic on Google Fonts: Neo-Grotesques
Download v.3.000: Arimo | Google Fonts