CalDavZAP is a CalDAV Web client with a powerful event/todo editor. It is compatible with Safari, Webkit, Firefox, Opera (15+), iCab, and Chrome, and supports all major CalDAV servers.
CardDavMATE is a CardDAV Web client with a powerful vCard editor. It is compatible with Safari/Mobile Safari, Webkit, Epiphany, iCab, Chrome, Firefox, and IE9, and supports all major CardDAV servers.
A high performance, scalable database modeled after Bigtable.
An IDE for HTML, Bash, Perl, PHP, C, etc.