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Listed below are some of the best free software for your productivity. Most of them can be used to replace other commercial product available now. The list will always be updated so it’s better that you bookmark this page for further reference.

OpenOffice.org

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.

This is the best alternatives available for Microsoft Office Suite, OpenOffice.org has not only received several awards and accolades, it is one of the best alternatives to managing your document, spreadsheets, presentations and more.

Download OpenOffice.org | Learn more about OpenOffice.org

Thunderbird

Thunderbird 2 includes many new features to help you manage your inbox. With Thunderbird 2, it’s easier to prioritize and find your important email with tags and the new find bar helps you find content within your email faster.

Maintaining several email accounts in a single place has always been a forte associated with Microsoft Outlook. Thunderbird on the other hand is a alternative which is as good as Outlook if not better, providing you with the many of the same features to manage multiple email accounts at no cost at all.

Thunderbird lets you manage your POP and IMAP accounts with ease. Thunderbird also allows you to extend the basic functionality by allowing you to add useful add-ons and extensions making it just too good to resist.

Download Thunderbird | Learn more about Thunderbird

Dia

Dia is roughly inspired by the commercial Windows program ‘Visio’, though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and many other diagrams. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.

It can load and save diagrams to a custom XML format (gzipped by default, to save space), can export diagrams to a number of formats, including EPS, SVG, XFIG, WMF and PNG, and can print diagrams (including ones that span multiple pages).

Download Dia for Windows | Learn more about Dia