Idubeeis an online spreadsheet application built with Adobe Flex framework. Currently it's in alpha stage but it's already pretty functional application. Please, log in to try it (currently by invitation only)
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Idubee has several features that make it different from other offline/online spreadsheet applications:
- It is built on Adobe Flex technology, not JavaScript. Adobe Flex provides a desktop like experience in all browsers where Flash Player 9 is supported.
- Support for big files with complex formulas and lots of data (4^32 rows and columns)
- Extensible by users (embedded scripting language) and other developers thru plug-in infrastructure.
- Offline support (in Flex and Adobe AIR versions)
- Collaboration (thru distributed version control system)
Please, take a look at screencast.