Free online resources for learning Chinese writing include Learn NC, FluentU and Arch Chinese. Fluent in 3 Months and FluentU are also portals where learners can find a wealth of Chinese learning resources, including writing resources.
Learn NC features Chinese writing lessons, including the formation of Chinese characters, basic radicals, basic strokes and stroke order. Arch Chinese is a learning system developed by Chinese teachers in the United States and intended for students of all age levels. The system utilizes animated stroke sequences and flashcards to help students develop their writing and recognition skills.
Fluent in 3 Months contains links to more than a dozen websites, including Chinese dictionaries and character recognition programs. As of 2015, FluentU features six paid and free Chinese reading and writing resources, including Anki and Skritter.