Shareware license
This is speculative content about a potential future parametric license. It was originally contributed by anonymous trolls in 2004.
Could a shareware license become part of a future Creative Commons Public License regime? It would certainly cut the number of bizarre and strange shareware terms and encourage authors to encourage their users to create Common Content with their software, or compatible with their software.
For instance, game developers could encourage the development of scenarios licensed as CC.
To deal with the many variant terms, probably this would have to be a parametric license to allow for the specification of expiry dates, price, and other terms of use that might apply such as the nondisclosure agreement clause that typically restricts re-engineering.