Softmaker Office for Android sounds promising.

I received Softmaker's newsletter today and they are currently doing an internal testing of their Office suite of applications for Android phones and tablet. Based on what I've read on Softmaker's blog, the product sounds robust compared to existing Office-like products on the Android platform. Even Microsoft office for Windows Phone pales in comparison. The latter doesn't support office 97.

"I have already talked in the past about the features that make SoftMaker Office the most powerful Android office suite – such as tables, PDF export, a full implementation of tracked changes, comments like in Microsoft Word, image support in many different file formats, exact rendering of all Excel charts, a huge number of calculation functions in PlanMaker, and the ability of SoftMaker Presentations to show all animations and transitions of Microsoft PowerPoint.

But the most important thing: all three programs read and write the classic and the current document formats of Microsoft Office 97 up to 2010 seamlessly:

• TextMaker reads and writes DOC and DOCX files,
• PlanMaker reads and writes XLS and XLSX files,
• and SoftMaker Presentations reads and writes PPT, PPS, PPTX, and PPSX files."

Softmaker Office for Android supports Dropbox and integration with the popular Evernote is in the works. The blog post also announces the availability of the app for public beta testing soon. 

Read more here.