MyStat
970 websites

MyStat offers both free and paid options

http://www.systat.com/MystatProducts.aspx

MYSTAT, the free student version of the SYSTAT statistics and graphics package.

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Open Web Analytics
109 websites

Open Web Analytics is free to use

http://www.openwebanalytics.com/

Open Web Analytics (OWA) is open source web analytics software that you can use to track and analyze how people use your websites and applications.

Market Share by Top Websites

1 MyStat is leading in Top 1M Sites and The Entire Web.

2 Open Web Analytics is leading in Top 10K Sites and Top 100K Sites.

Websites Categories

1 MyStat has better usage coverage in more websites categories. Including Heavy Industry & Engineering, Adult, Arts & Entertainment, Vehicles and 18 other categories.

2 Open Web Analytics is leading in Reference Materials and Home & Garden.

Geography

1 MyStat is leading in most countries, including Hungary, Romania, United Kingdom, Slovakia and 17 other countries.

2 Open Web Analytics is leading in Austria, Germany, Canada, Greece and 3 other countries.