56 Open Source Replacements for Popular Web Development and Design Tools: Page 2

15. DotNetNuke Replaces: Sitecore CMS, Kentico Used by 600,000 Web sites around the world, DotNetNuke calls itself "the leading open source Web content management system for ASP.NET." It is designed to help you create dynamic Web sites with lots of interactive features (i.e., Web apps). Operating System: Windows

16. Get Simple Replaces: Sitecore CMS, Kentico The "simplest content management system ever," GetSimple boasts that it has a very easy learning curve. It also offers good security and a sizable library of plug-ins to expand its capabilities. Operating System: Linux

17. Liferay Replaces: SharePoint, Open Text. Liferay helps users create enterprise portals for a variety of purposes. It's been downloaded more than 3 million times and counts a number of Fortune 500 companies among its users. Operating System: OS Independent

18. Magnolia Replaces: SharePoint, Sitecore CMS, Kentico Designed for enterprise users, Magnolia offers features like concurrent editing, comparing revisions, deletion workflow, and content translation that make it easier to work with geographically diverse teams of writers. Its users include the U.S. Navy, Texas State University, JBoss, and others. Operating System: Windows, Linux

19. Owl Intranet Knowledgebase Replaces: nGen Knowledgebase, Interspire Knowledge Manager This Intranet engine makes it easy to create a knowledge base that can be shared among multiple users. It also comes in an ultralite version that is suitable for smaller groups or individual users. Operating System: Windows, Linux

20. WebGUI Replaces: Sitecore CMS, Kentico This "all-in-one CMS" combines content management features with a Web application development framework. With it you can publish articles, set up forums, create photo galleries, conduct polls, create interactive event calendars, sell subscription-based services and more. Operating System: Windows, Linux/Unix, OS X

Databases

21. MySQL Replaces: Microsoft SQL Server Standard The "de facto standard for high-traffic Web sites," MySQL is incredibly popular as a back end for Web sites. In addition to the free community server version, it's available in a number of commercial editions which are support by Oracle. Operating System: Windows, Linux, OS X

22. PostgreSQL Replaces: Microsoft SQL Server Standard PostgreSQL may not be as popular as MySQL, but it does claim to be "the world's most advanced open source database." It's highly scalable, requires little maintenance and tuning, and offers excellent reliability. Operating System: Windows, Linux, OS X

23. Firebird Replaces: Microsoft SQL Server Standard Now almost 30 years old, Firebird is a relational database with many ANSI SQL standard features. It prides itself on its excellent concurrency, high performance and powerful language support for stored procedures and triggers. Operating System: Windows, Linux, Unix, OS X, Solaris

E-Commerce

24. Zen Cart Replaces Big Commerce, Volusion, Yahoo Merchant This shopping cart is designed to be used by anyone with very basic Web skills. Features include newsletters, quantity discounts, gift certificates, coupons, multiple shipping options, multiple payment options and more. Operating System: OS Independent

25. PrestaShop Replaces Big Commerce, Volusion, Yahoo Merchant This lightweight shopping cart offers a sleek, intuitive interface and good scalability. It's currently used by more than 40,000 e-commerce sites. Operating System: Windows, Linux, OS X

File Transfer

26. FileZilla Replaces: CuteFTP, FTP Commander This app offers a multi-platform file transfer client and a Windows-only FTP server. IPv6 compatible, it supports FTP, FTPS and SSH. Operating System: Windows, Linux, OS X

27. WinSCP Replaces: CuteFTP, FTP Commander This file transfer client recently hit a milestone—it's 40 millionth download. It supports FTP, SFTP and SCP protocol. Operating System: Windows

28. FireFTP Replaces: CuteFTP, FTP Commander Unlike the other apps on our list, FireFTP is a browser add-on, not a standalone app. It makes it easy to access FTP servers via Firevox. Operating System: Windows, Linux, OS X