A typographic Node pre-processor for your html which uses zero client-side JavaScript and gives you hanging punctuation, soft hyphen insertion, optical margin outdents, small-caps conversion and punctuation substitution.
typography
Typeset.js
Professional Web Typography by Donny Truong
A free ebook providing practical advice on Web typography.
Typecast by Monotype
Design with web fonts in the browser. Use Typecast to create visual and semantic designs. Check for readability, rendering and beauty then share a working prototype of your design.
Typ.io
Great examples of pairing the right fonts together.