• EditGrid
  Spreadsheets on-the-web !
  A web-based online spreadsheet with real-time collaboration features
  collaboration online real-time spreadsheet web-based
  in webapps > publishing with collaboration online service social spreadsheet by 5 users (all private)
• Functions : Function list - Google Docs Help
  in Public bookmarks with cheatsheet formulas google spreadsheet
• Google Fusion Tables (Beta)
  Upload small or large data sets from spreadsheets or CSV files. Visualize your data on maps, timelines and charts. Pick who can access your data
  in Public bookmarks with chart csv editor generator google spreadsheet
• Kanakku.com - Spreadsheet Calculator
  combination of a spreadsheet and a scientific calculator. Support for arithmetic, trigonometric, and statistical functions
  in Public bookmarks with advanced calculator spreadsheet
• TABLEIZER! -- Spreadsheets to HTML Tables Tool
  A quick tool for creating HTML tables out of spreadsheet data. Paste your cells from Excel, Calc or other spreadsheet here:
  in Public bookmarks with converter excel html online spreadsheet table tools xls by 3 users
• www.ajaxxls.com
  open and edit any .xls files, no login required.
  in Public bookmarks with ajax online spreadsheet web2.0 by 2 users

spreadsheet from all users