Thousand of freeware fonts are available today. Here are some which are actually recommendable in the category “sans serif”. They have a sufficient number of styles, a sufficient (Latin) character set and an acceptable stylistic and technical quality.
Font and Typography Lists:
Free Font Lists
The best free sans serif font families (2018)
Alegreya Sans is a humanist sans serif family with a calligraphic feel designed by Juan Pablo del Peral for Huerta Tipográfica.Initially commissioned by Pentagram to evolve his Polaris Condensed typeface, Chester Jenkins created a new digital form to support the newly transformed museum. The new font can be downloaded free of charge for unrestricted public use under the SIL Open Font License.Originally designed in 2012 as Fira Sans for Mozilla OS. FiraGO is a new branch of the original project that is actively developed further.Lato is a sanserif typeface family designed in the Summer 2010 by Warsaw-based designer Łukasz Dziedzic (“Lato” means “Summer” in Polish). In December 2010 the Lato family was published under the open-source Open Font License by his foundry tyPoland, with support from Google.Open Sans is a humanist sans serif typeface designed by Steve Matteson, Type Director of Ascender Corp.PT Sans was developed for the project "Public Types of the Russian Federation." The second family of the project, PT Serif, is also freely available.Latina Essential is a humanist typeface designed for use in continuous text. The font comes in 4 weights with matching (true) italics. To download the font you need to sign up for the foundry newsletter.IBM Plex is a font family designed as corporate typeface for IBM. But from the start it was also made freely available under the Open Font License.A free font family originally designed for the Danish School of Media and Journalism.A free font family originally developed for the Mexican book store chain Gandhi.Merriweather Sans is a low-contrast semi-condensed sans-serif text family. As of now there are 8 styles: Light, Regular, Bold, and ExtraBold weights in Roman and Italic styles.Source Sans Pro is a set of OpenType fonts that have been designed to work well in user interface (UI) environments.The Ubuntu font family are a set of matching libre fonts. The development is being funded by Canonical on behalf the wider Free Software community and the Ubuntu project. The technical font design work and implementation is being undertaken by Dalton Maag.