The only examples I can think of are projects run by the FSF and some corporations (the projects run by Oracle, for example). You can contribute to the Linux kernel, Apache, the BSDs, Ruby, and really most FOSS projects without signing away anything.
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Most large projects require the forfeit of all copyrights before you can join the project.
The only examples I can think of are projects run by the FSF and some corporations (the projects run by Oracle, for example). You can contribute to the Linux kernel, Apache, the BSDs, Ruby, and really most FOSS projects without signing away anything.
I stand corrected