Sans-serif

Sans-serif (Wikipedia)

a sans-serif letterform is one that does not have extending features called "serifs" at the end of strokes. ... often used to convey simplicity and modernity or minimalism.

Arimo — 0.9 MB

Preview

Roboto, Roboto Condensed — 1.5 MB

Preview

GNU Unifont

Preview

GNU Unifont is part of the GNU Project.

It contains glyphs for every printable code point in the Unicode Basic Multilingual Plane (BMP) with growing coverage of the Supplementary Multilingual Plane (SMP).

GNU Unifont (Basic + Supplementary) — 11.2 MB

GNU Unifont (Supplementary) — 2.1 MB

For Emoji, getting the Supplementary version is enough. The Supplementary glyphs are also included in the full GNU Unifont fontpack.