• Callbacks for events • SSL Support • Easy to use • Uses libevent for portability (tested on Linux/FreeBSD) • IPv6 support • No failures on Autobahn Test suite

• Cross-platform (Unix, Windows, Mac OS X, ...) • Strictly compliant to RFC 3986 (latest URI RFC on track STD 66 to date) ◦Parsing ◦Reference resolution (section 5.2, since version 0.4.0) ◦Reference creation (since version 0.5.2) ◦Recomposition (section 5.3, since version 0.4.0) ◦Syntax-based normalization (section 6.2.2, since version 0.5.0) • Fast (linear input length time complexity) • Unicode support • No external dependencies • Extensive unit testing using CppTest • Liberal license (New BSD license)