Preact.js - Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.
Pilot - Focus on your business, knowing that our expert bookkeepers, aided by software superpowers, are taking care of your books.
Inferno - An extremely fast React-like javascript library for building modern user interfaces.
Bench Accounting - Bookkeeping done for you
Glimmer - Fast and light-weight UI components for the web
Xero - Xero is online accounting for your small business.