HelloChinese VS wenlin

My experience with DuoLingo as well. I've learned Portuguese, Spanish, and some Italian with it, but Mandarin seems to fall short. I'm liking HelloChinese so far. Source: almost 3 years ago

I don't think Rosetta Stone will be nearly advanced enough for you, from what I recall it's quite basic. I'm personally really liking HelloChinese as a way to learn and practice, but again I'm far below your level. I've heard good things about Skritter for learning characters, and I've used Memrise before for other languages to improve my vocabulary and I've heard it's good for Mandarin as well. Searching for... Source: almost 3 years ago

Wenlin is a text editor designed specially for chinese language learning. That doesn't fully describe its functions though, and the website doesn't explain it well either, so here is a short demo. It has many more features not shown, but that should give you a sense of what it's about. I find it especially useful for note-taking due to the ability to type freely in english (or your preferred language), seamlessly... Source: over 2 years ago

Wenlin works for cut and paste. Just don't let it become a crutch where you're only looking at the Pinyin and not the character. Source: over 2 years ago