The phrase 'countless other things' is correct and usable in written English.
You can use it when you want to refer to a large number of things that are too numerous to count. For example, "In addition to the beautiful scenery, this vacation spot also offers countless other things to do, such as biking, hiking, and swimming."
I would rather be asked about that than countless other things.
They lied about mobile weapons labs, yellowcake from Niger, how painless a war would be and countless other things.
Peer pressure, mob mentality and countless other things show how people often go against their own beliefs and instincts purely to avoid standing out and not being accepted.
Although the USPTO has been mainly at fault, America's courts have not helped.One of the worst offenders has been the US Court of Appeals for the Federal Circuit, the appellate court that rules on patent disputes, among countless other things.
If the auto industry believes 2015 will be better, it will invest in bigger plants, hire more employees, place bigger orders with its suppliers and do countless other things that can push a recovery along.
More than 150,000 applications have been created for it in less than two years, transforming the iPhone into an e-book reader, a flight control deck, a musical instrument, a physician's companion, a dictation device and countless other things that were impossible just 24 months ago.
We covered USB sticks shaped like cat tails, mini cats, humping dogs, puppies and countless other weird things, but cat ears [JP] are new.
But you can also use it for countless of other things.
Arts are used in website and user interfaces design, advertising, product design and usability, branding and start-up creation among countless other uses, all things that are crucial to STEM learning and careers.
Even venerable old Hewlett-Packard has metamorphosed countless times, producing, amongst other things, oscillators, medical equipment, calculators and laser-jet printers.
Such an arrangement would bear a similarity to exactly the highly leveraged, and eventually disastrous, special-investment vehicles that banks like Citigroup created in countless numbers to hold, among other things, securities backed by subprime mortgages.
