Anki is by far the most versatile spaced repetition software out there. It's not the easiest one to install and understand exactly how to use, but once you are familiar with it, you can do anything... Read more.

ankisrs.net

Pleco is one of the most popular mobile dictionaries for Chinese learners. It basically removes the need for any kind of paper dictionary and allows easy look-up for words using English, hand-writi... Read more.

pleco.com