typing.io is described as 'Typing.io is a typing tutor for programmers. Practice typing the hard-to-reach symbols in code' and is an website in the education & reference category. There are more than 25 alternatives to typing.io, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and Chrome OS. The best alternative is Klavaro, which is both free and Open Source. Other great sites and apps similar to typing.io are keybr, KTouch, Typing.com and Monkeytype.
Rašyti is a multilingual and multi-keyboard touch typing trainer, currently covering 28 languages. Offline applications for Linux, Windows and MacOS are available. However, it can also be used online as a web service.
TypingMaster is a professional typing tutor that helps you double your typing speed. It adapts to your unique needs providing customized exercises and helpful feedback. Weak spots are pinpointed and rapidly eliminated with additional exercises.
Test your typing speed, find answers to the top questions on typing and see how to improve your typing skills quickly. You can choose to practice with text, words or with a custom text (you send your own text to practice). Tests with timer are also available.
Typing Club is a free web-application aimed at teaching the basics of touch typing and further improving your keyboard skills. Multiple layouts available. Progress can be saved online via Facebook, or by signing up for a free account, so you can continue learning wherever you go.