docstoc- free lets you protect your PDF by no printing copying, downloading and is hosted online. so your recipients have to go to the website.
not great but I am using it now.
fileopen- dead main phone number.
gigatrust- only works with active directory, (server + exchange+ sql) expensive over 15k
protectPDF- $2000 a yr. not as good as hosted livecycle.
brainloop- $500 a month
Ensemble shared review- only works if you have a livecycle license $85k
Araloc- enterpise solution, forget price but its very expensive.
Adobe should migrate ACD over to acrobat.com.
FileOpen for an hosted solution : 4,000$ per year !! (I've got this price, from their mail client service)