Download of SDR Locker 1.3 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. SDR Locker is included in Office Tools. This software was originally developed by Sodevrom. We recommend checking the downloaded files with any free antivirus.
From the developer:
SDR Locker will help you secure your documents, images, ebooks, webpages and movies. You can create a time-limited version of your projects that will help you sell them with ease.
You have the possibility to implement a series of features that will make your products bullet-proof. With just a few clicks you can create an executable from any local file.
You may want to check out more software, such as G-Lock EasyMail7, Lock USB or SysTools PDF Lock, which might be similar to SDR Locker.