The fonts have been converted in to all modern web font formats: WOFF, WOFF2, the short-lived and obsolete SVG font format, and even the now-obsolete EOT used in first-2000s-decade versions of Internet Explorer. In addition, the Fontforge .sfd source files are available for the primary fonts (Again: Serif regular, Serif italic, and Sans semi-bold).
Files can be viewed either here or at the GitHub repo. There’s also a sample of how text looks rendered with the primary fonts.
The fonts are open source, as described in COPYING.TXT.
!"#$%&'()*+,-./0123456789:;<=>? @ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_ `abcdefghijklmnopqrstuvwxyz{|}~ ÁÉÍÑÓÚÜ¡•«»—áéíñóúü¿‘’“”©∞→ a→b→c→d→e
!"#$%&'()*+,-./0123456789:;<=>? @ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_ `abcdefghijklmnopqrstuvwxyz{|}~ ÁÉÍÑÓÚÜ¡•«»—áéíñóúü¿‘’“”©∞→ a→b→c→d→e
!"#$%&'()*+,-./0123456789:;<=>? @ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_ `abcdefghijklmnopqrstuvwxyz{|}~ ÁÉÍÑÓÚÜ¡áéíñóúü¿‘’“”