openoffice
What is open office? have you ever heard of Microsoft Office? do you know how much is it? really!? wow, well I suggest you to see this one at the very nice price tag of $ 0!
Of course it can open your old Microsoft office files aaand you can also open and save PDF files.
As this guys says in his website OpenOffice.org 3 is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. It can be downloaded and used completely free of charge for any purpose.
Enjoy this Super App!
File Extensions
that each application can open are listed belowtxt
This are generally text files, and contains simple plain text that can be opened with nearly any software, generally we will prefer notepad or any other simple software like notepad++
dat
This is a very generic file extension it could be really anything, we recommend to look at the software list we provide and look for the context in which you found the file to use a appropiate application to open the file, in case you are not sure try opening it with Notepad++ that handles nearlly all files pretty well
xlsx
This file extension corresponds to an excel file which has been saved with on of the latest version of excel (above 2007) and can be opened with office suite 2007 or a new version of open office.
The format itself is an organized xml which tells the application where is each block element and its properties.
Another free alternative for windows is excel viewer which can open this file without having excel installed.
The Applications are sorted by their respective software popularity and you will find all the FREE programs above.
