Grail
Grail was a multi-platform Internet web browser developed by CNRI (Corporation for National Research Initiatives). Grail supports the protocols and file formats commonly found on the World-Wide Web, such as HTTP, FTP, and HTML, but, unlike most browsers, it is also easily extended to support other protocols or file formats, such as CNRI's handle protocol.
Grail web browser was written in the Python programming language. Grail is distributed by CNRI free of charge, and can be freely redistributed. CNRI's last released version 0.6 in 1999 and has been un-maintained since then. Grail development is now hosted on SourceForge. Grail is distributed in source form, free of charge, and without warranties.