AlternativeTo is a website that attempts to present some of the best free or low-cost alternatives to some of the expensive commercial applications. For example, run a search on Dreamweaver and you'll find various cheap apps that will do much the same thing. If you can't pick one of the alternatives yourself, simply refer to the number of people who like a particular application. If you only want freeware, just to view only the free alternatives.
Could be used for everything from search-and-rescue robots to wearable tech
Don't require the rare material being mined from the mountains of South America
IBM hopes that its new tool will avoid bias in artificial intelligence
Found by calculating the strength of the material deep inside the crust of neutron stars