A new version of Hack, an open source typeface designed for use in source code, has been released and it should make reading code easier for designers and developers when in smaller sizes.
The new version offers new type features, changes in weights, spacing, and glyphs and it's sweet spot, according to programmer Chris Simpkins, is in the 8px-12px range on modern desktop and laptop monitors (but is still legible at 6 or 7px sizes when being used on an HD monitor).
Hack has been released as a free and open source project that is free to modify, use commercially, and download for print, desktop, or Web use.