PCMag's top pick for software to take control of other computers is TeamViewer. Almost everything you need is free: desktop sharing, file transfers, even chat with remote users. And the setup couldn't be easier. Take control of a PC over a Web connection and a Chrome browser (even in ChromeOS) with the TeamViewer extension. There is also a Windows app in the Microsoft Store and optional downloads to make installing TeamViewer on multiple PCs even easier—though it's only free for personal use.
A special issue arises when a license requires changing the name by which the program will be invoked from other programs. That effectively hampers you from releasing your changed version so that it can replace the original when invoked by those other programs. This sort of requirement is acceptable only if there's a suitable aliasing facility that allows you to specify the original program's name as an alias for the modified version.
Free software played a significant part in the development of the Internet, the World Wide Web and the infrastructure of dot-com companies. Free software allows users to cooperate in enhancing and refining the programs they use; free software is a pure public good rather than a private good. Companies that contribute to free software increase commercial innovation.
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.