Ars Technica writes that "At SourceFoundry.org this week, programmer Chris Simpkins debuted the 2.0 version of Hack, an open-source typeface designed specifically for use in source code." The revamped font is" characterized by a large x-height, wide aperture, and low contrast design in order to be "highly legible" at common coding text sizes," and the font specimen shows how legible it is right down to downright tiny sizes, though Simpkins says the sweet spot is between 8 and 12 pixels.
Hack's roots are in the libre, open source typeface community, and the project expands upon the contributions of the Bitstream Vera & DejaVu projects. ... Simpkins has been working on the project throughout 2015, and he tweeted that this latest version includes "new open type features, changes in weights, significant changes in spacing, Powerline glyphs, and more." The typeface now comes with four font styles: Regular, Bold, Oblique, and Bold Oblique.