Hellotalk: One of the biggest language learning apps. You can find native speakers around the world to chat with. Free. 最大的语言学习类app之一，你可以找到世界各地的母语人士进行聊天，免费喔~！

Speaky: Just like Hellotalk, but more web-based. Free. 和Hellotalk 差不多，但更网页式，同样免费~！

Tandem: Unique language learning community with high standards for members. Free. 独一无二的对成员有着高标准的语言学习社区。免费！

italki: One of the earliest language learning communities. You can meet language partners, share your writing to get corrected, and also find inexpensive community tutors to help you practice. Free w/ paid features. 最早的语言学习社区之一，你可以在这里找到语言伙伴，分享你写的东西让他们帮你修正，而且还可以找到便宜的社区导师帮你进行练习。（免费，但会附有付费内容）