Technically all of them come with restrictions, because if Nasa released them that software is still subject to the US's "we wrote this so we can sue you, not t

Technically all of them come with restrictions, because if Nasa released them that software is still subject to the US's "we wrote this so we can sue you, not to actually prevent it" export bans on software to countries it doesn't like. For example, none of these programs may be made available to Iranians, even if they were to aid somehow in fighting the Iranian government.