Certain kinds of rules about the manner of distributing free software are acceptable, when they don't conflict with the central freedoms. For example, copyleft (very simply stated) is the rule that when redistributing the program, you cannot add restrictions to deny other people the central freedoms. This rule does not conflict with the central freedoms; rather it protects them.
The first of a few Piriform programs on this list, CCleaner—the first C is for Crap!—is one of the best, and pretty much essential for keeping a system going. What it does is simple: it cleans up extraneous files to keep a system running better. Get it and run it, regularly. It'll even delete some apps you didn't think you could get rid of—like those provided in Windows 10, whether you wanted them or not.
One of the new class of messaging services with an ecosystems of apps, Telegram delivers not only easy communications, but also encryption security end-to-end. It's a stand-out on iPhone, and has native apps on just about every platform available. Send messages, files, photos, animated GIFs (the search is built in), and create channels of up to 5,000 people to broadcast to.
Something to always watch for: crapware installers. To make ends meet, many creators of otherwise great free software, or the services that offer the programs for download, bundle in things you don't want. Worse, the installation routine obfuscates the steps, so you provide the unwanted program tacit permission to be installed. For more about how to spot and avoid this problem, see How to Clean Crapware From a New PC, and check out the Uninstaller section of this very free software collection.
Printing to a printer locally can be a hassle sometimes. Over a network it doesn't get better, and over the Internet? Get ready to tear your hair out at the roots and use the blood as ink—it's faster. Unless you've got PrinterShare installed. Put the software on a PC connected to a printer (or on the network with one), set up an account, and then any PC should be able to see the printer(s). You can even print right from the Web. Sadly, the mobile versions are premium only.
Adobe created the PDF format, so it stands to reason it would still offer a pretty kick-ass free PDF reader, albeit one that's not as full-featured as some others, since it has other tools it wants to sell you. (The DC stands for Document Cloud, Adobe's attempt to get you to store everything online via Adobe.) Using it, you can easily annotate or sign PDFs, fill out forms, or even save a PDF to Word or TXT format.
A report by Standish Group estimates that adoption of free software has caused a drop in revenue to the proprietary software industry by about $60 billion per year. In spite of this, Eric S. Raymond argues that the term free software is too ambiguous and intimidating for the business community. Raymond promotes the term open-source software as a friendlier alternative for the business and corporate world.
Quora has been quite a successful strategy for us lately. Both Mustafa (from our marketing team) and I have been getting consistently high views on our answers, which translates into some pretty decent traffic. Even better, that traffic is really high quality, because people are usually well and truly into their research phase when they read answers on Quora.
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.
Online marketplaces and listing sites can produce a steady stream of leads. While the effectiveness of directories varies by industry, marketers can get a jump on their competition by optimizing a listing or being the first to get listed. For example, in the digital agency industry, an agency has several different places to list their services: Digital Agency Network, Clutch and Agency Spotter are all collections of agencies.
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). 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.