Bcoin is consensus aware and is up to date with the latest BIPs, supporting Segregated Witness, versionbits, CSV, and compact block relay, according to Github. It also has preliminary support for BIP151 (peer-to-peer encryption), BIP150 (peer authentication), and BIP114 (MAST). It runs in node.js, but it can also be browserified.
In a posting on Medium, Purse noted it was established to provide real world applications for bitcoin. It began by offering Amazon discounts. It now carries more inventory than Amazon, eBay and Google Shopping, with lower prices. The company’s mission is to