Looking for commercial code gone open source

[Peter Risdon]

Jonathon McKitrick wrote:
> Does anyone know where there are any web-accessible examples of large or
> medium sized commercial software products that have been open sourced?
> 
> I'd like to see some examples of code that were not written from the
> beginning with the intention of being open source.
> 
> jm

I'm not sure how well this will meet your criteria, but Star Office 
began as a closed cource commercial product and, while under that name 
it remains commercial, Open Office is an open source version.

However, I think the code base has changed significantly prior to it 
becoming open source.

Peter.