Why not just put stuff into the public domain?
In particular, Dr. Richard Hipp (SQLite's main author) has talked about problems that came up from releasing it into the public domain. He eventually created a second license specifically for companies in places that didn't legally recognize the public domain, and wanted to make sure they were protected from liability.
Licensing is complicated.
( http://wiki.creativecommons.org/CC0_FAQ , https://creativecommons.org/choose/zero/ )