ThinkfreeFox: open any office file directly from Firefox
ThinkfreeFox is a Firefox add-on that lets you view office files (.xls, .doc, .ppt, and others) inside Firefox, without the need of having an office suite installed in your computer. After you install this small extension, Firefox automatically adds an icon on web pages to let you view any of these files with a single click (see image below). Your file will be opened with ThinkFree viewer, that runs on ThinkFree servers.
Based on my tests, I can say the experience is very smooth and the formats were kept for .xls and .ppt. On the .ppt case, even the slide transitions worked really well.
ThinkFree is one of the best online office suites available, along with Google Docs and Zoho. They are around for a while, and offer a very robust and similar alternative to Microsoft Office.
ThinkfreeFox is still on experimental phase and can be downloaded here.
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