Monospaced ligature fonts

A recent trend in the world of programmer fonts is support for ligatures to make the punctuational digraphs we use in code (like ==, ->, etc) look prettier.

• Hasklig (free). Based on Source Code Pro, probably my favourite outline monospaced font. Originally optimized for Haskell, but a few more operators are being added from Erlang, Verilog, and other functional languages.
• Fira Code (free). Based on Mozilla’s Fira Mono typeface, with support for operators from many different programming languages.
• Monoid (free).
• Pragmata Pro (US$59). Very featureful, but I’m not sure I like the design otherwise.
• Iosevka (free).