SpongeCell New Ajax Calendar
SpongeCell is an online web based Calendar which is built on Ruby on Rails. It has a nice drag and drop interface. It allows you to import iCalendar events which can be shared with your friends and contacts. It has a nice mobile interface. Above all it supports Natural Language Processing(NLP) wherein you can type a sentence like “Meeting at 10A.M” in the SpongeBar and it will be automatically added as an entry in the corresponding date and time that you have mentioned.