Marten Mickos CEO of MySQL AB
Marten Mickos, MySQL
memcached Key to scaling for many leading Web 2.0 companies.
Maatkit Great example of what one person can do in a huge community.
PrimeBase XT Demonstration that transactional storage engines can be developed rapidly for MySQL.
XAMPP An amazing service for those looking for convenience: XAMPP provides easy-to-use AMP stacks in one downloadable and installable file, and they have impressive downloads (stats on their site).
Hadoop Very exciting new project around scaling with vast amounts of data.
Simon Crosby CTO, XenSource
Simon Crosby, Xensource
Open Solaris Suns answer to Linux a high performance, highly scalable community driven OS that has all the enterprise features of Solaris. Most notable is the way that Sun has built its community and is now recovering from the initial PR hit of Linux. Solaris is a superb OS, including the ZFS file system.
Mozilla Continues to drive innovation in delivery of web based applications becoming the standard browser for Google, preferred by Google, and with dramatically improved security.
Xen The open source hypervisor has spawned a number of products significant to the enterprise datacenter.
Stormy Peters Director of Community and Partner Programs, Open Logic
Stormy Peters, OpenLogic
I picked my favorites based on the communities, she says.
Linux kernel They sometimes get a bad rap but this project does a phenomenal job of coordinating all the different people, interest groups and companies and still sticking to their ideals.
Apache httpd The Apache Foundation is a model that most open source projects can strive for. It has a very large, welcoming community that turns out some great projects, just look at how prevalent the Apache web server is!
GNOME My introduction into open source was through the GNOME community and so they have a special place in my heart. I have to say they were extremely welcoming from day one.
Stormy tells the story of that day: I was in Denmark going to my first open source conference ever (GUADEC) and when I walked in the door, the woman at the check-in table yelled very loudly! YOURE A GIRL! It was quite the welcome! She had been wondering ever since I registered. There werent very many of us women at the conference or at any open source conference Ive been to since except in Malaysia. GNOME is a large, successful, open source group that not only has a great product but has a lot of fun creating it!