Twitter / Myspace / Facebook bot software that offers fully functional trial?

I've been looking through the forums about this but haven't found anything specifically about this... basically I'd just like to find software for auto posting to twitter / auto-following and also software that does similar functions for myspace, facebook, etc... I tried some a while back but they all restricted the trial (now just limiting it to 10 days, or whatever but actually made it basically useless it seemed)... sicne I'm using virtualbox anyways for other software to make it never expire I'm just wondering if anyone knows of any for these that have fully functional trials.

Thanks