Editgrid

Web-based, feature-rich and collaboration friendly spreadsheet (i.e. Excel) service, with a host of extra features.

Features:

create and work on unlimited nr. of spreadsheets
Sharing (via Permalink or embedding) and collaboration
in-built Live Chat
Real time updates (changes highlighted in color)
Stream live data from external source directly into your spreadsheet (Eg. Stock quotes, exchange rate etc)
Offsite backup via EditGrid sync.
and more …
premium version VS Free version