オンラインスプレッドシート
Expresso spreadsheet - Workgroup, & Enterprise accounts.
Google Docs - Enterprise (and other) edition.
Microsoft Office 365
CollateBox
Resolver One
Smartsheet
ThinkFree Office Calc
Zoho Office Suite - Business account.
EditGrid - scheduled closing on May 2014
Expresso spreadsheet
Google Docs
Office Online
Sheetster
Smartsheet
ZCubes - Calci
Zoho Office Suite