Linklok URL
Protects files by securing links to them using MD5 hashing. This way nobody ever knows the true location of your files. Links can also have an expiry time from 1 minute to several years if required making it easy to control access. Linklok URL can also be used with a download form to email secure time limited links to a user. User only gets the links if they enter a valid email. Can also filter out free or other types of email addresses if necessary. Now has a manual entry form, CAPTCHA code, Aweber, GetResponse, Mailchimp, ARP Reach, Amazon S3, Dropbox, Sendgrid and PDF Watermarking support as well. eCommerce versions for Paypal, 2CO etc also available.