Distribution of source code. One of the problems with most proprietary software is that you can't fix bugs or customize it since the source code is not available. Also, the company may decide to stop supporting the hardware you use. Many free licenses force the distribution of the source code. This protects the user by allowing them to customize the software for their needs.
The freedom to redistribute copies must include binary or executable forms of the program, as well as source code, for both modified and unmodified versions. (Distributing programs in runnable form is necessary for conveniently installable free operating systems.) It is OK if there is no way to produce a binary or executable form for a certain program (since some languages don't support that feature), but you must have the freedom to redistribute such forms should you find or develop a way to make them.
Imagine not having the hassle of Windows, but still being able to run (most) Windows programs? That's the goal with ReactOS, which builds on the old Windows NT architecture as an open source operating system. And it only takes a 150MB to install it, so it's small. You can grab it as a full installer, or make a LiveCD version that boots off a disc to give it a try.
A free sample or "freebie" is a portion of food or other product (for example beauty products) given to consumers in shopping malls, supermarkets, retail stores, or through other channels (such as via the Internet).[1] Sometimes samples of non-perishable items are included in direct marketing mailings. The purpose of a free sample is to acquaint the consumer with a new product, and is similar to the concept of a test drive, in that a customer is able to try out a product before purchasing it.

To the best of our knowledge ALL listed programs were completely free for non-commercial use when first listed and we encourage users and program authors to report any instances where this might not now be the case. Users are reminded that some software authors change their program’s status from freeware to shareware after it becomes popular, as is their right.

The best thing about some of these companies is that you don't have to "Like" them on Facebook, send messages on Twitter, or complete surveys. With the companies I've listed first, simply sign in, input your mailing information, and wait for the free sample to show up in your mail). It will take less than 15 minutes sign up and up to six weeks for samples to arrive.

The opposite of file recovery is utter destruction—the kind of thing you do to keep a file out of someone else's hands. Eraser does just that, writing over the spot where the file(s) lived until it's scrubbed clean, with no chance of coming back to haunt you. You can even use it to schedule a wipe of the free space on the disk, or just to purge your recycle bin. During setup you get the option to install an extension for Windows Explorer so you can wipe files or free space instantly.
Consider OneDrive the most flexible and all-encompassing sync and back-up tool going. It's the official cloud storage for users of Microsoft Office and Windows 10 (it's built right into the OS). OneDrive throws in 5GB of free online storage; you earn extra by referring friends or backing up smartphone cameras. If you subscribe to Office 365 Home, that storage jumps up to 1TB.
Free software or libre software[1][2] is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions.[3][4][5][6][7] Free software is a matter of liberty, not price: users—individually or in cooperation with computer programmers—are free to do what they want with their copies of a free software (including profiting from them) regardless of how much is paid to obtain the program.[8][2] Computer programs are deemed free insofar as they give users (not just the developer) ultimate control over the first, thereby allowing them to control what their devices are programmed to do.[5][9]
Eventually in this life, you're going to run into an archive file—a single file with multiple files stored (and compressed) inside it. They have different extensions, from RAR to ZIP to 7z and many more, and sometimes the program to open them costs you. Not 7-Zip. It opens all of those and more, and allows creation of new archives. It'll even encrypt the contents for safety. It's entirely open source.

Freeflys: Another strong contender in the freebies space, Freeflys has appeared on NBC’s Today Show, The Doctors, Fox News and a handful of other media outlets. Similar to most of these sites, Freeflys utilizes email alerts to tell users about free-sample offers as they happen. The site also allows you to search for a specific product with the handy search bar.