But as for the leads you work to gain yourself through your own marketing efforts, or with the help of software to reach out to, these are called free sales leads. These leads are the ones you have found on your own, and they may or may not be successful for you. It all depends on the sales lead and your marketing tactics to convert the lead. You might not have the added reassurance of interest from the bought leads, but these raw leads can still prove to be successful.

The Opera browser has been keeping up with the big boys for years, and it does so now by incorporating features no other browser has, in particular a built-in VPN service to keep your browsing secure, as well as ad blockers, a turbo mode, and even a battery saver that lets your laptop run longer than other browsers accessing the same content. It also comes in multiple versions for mobile, including Opera Mini, which compresses pages before you even load them.
In fact, such a movement exists, and you can be part of it. The free software movement was started in 1983 by computer scientist Richard M. Stallman, when he launched a project called GNU, which stands for “GNU is Not UNIX”, to provide a replacement for the UNIX operating system—a replacement that would respect the freedoms of those using it. Then in 1985, Stallman started the Free Software Foundation, a nonprofit with the mission of advocating and educating on behalf of computer users around the world.
Standard and Poor's is one of the most prestigious companies in the world. If you are familiar with the U.S. stock market, then you know that the company publishes the S&P 500, an index of the 500 most promising large publicly-traded companies in various industries. Standard and Poor's also rates and provides indices for smaller companies. The company's reports focus on financial information and credit ratings and can be very useful in tracking down leads in the financial sector.
Gale is an e-research tool offered by Cengage Learning. It's designed mainly for schools and educational research, but can be quite helpful in generating sales lead lists as well. Gale publishes over 600 databases, both in hard copy and online. These databases include both business information and collections of articles on various subjects. The article lists are particularly useful when you're collecting lists of publications related to your industry.
The obvious choice of Office tools if you are a firm believer in open source, LibreOffice was a fork from the original OpenOffice years ago (itself an offshoot of StarOffice). Inside are word processor, spreadsheet, and presentations programs, a vector graphics editor, a math formula editor, and a database. It's a little more awkward to use than the desktop version of Microsoft Office, but you can't beat the price. Grab the LibreOffice Viewer app for Android to look at files.

In 2006, OpenBSD started the first campaign against the use of binary blobs in kernels. Blobs are usually freely distributable device drivers for hardware from vendors that do not reveal driver source code to users or developers. This restricts the users' freedom effectively to modify the software and distribute modified versions. Also, since the blobs are undocumented and may have bugs, they pose a security risk to any operating system whose kernel includes them. The proclaimed aim of the campaign against blobs is to collect hardware documentation that allows developers to write free software drivers for that hardware, ultimately enabling all free operating systems to become or remain blob-free.

When the European Commission started dealing with Free Software on a regular basis, they sought to avoid the ambiguity of the English word "Free Software" and the misunderstandings of "Open Source" alike, which led to the adoption of a third term which has popped up occasionally since around 1992: "Libre Software." This term has proven resistant to inflationary usage and is still used in an identical way to Free Software. So it may pose a solution for those who fear being misunderstood when speaking English.
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.