Standford CoreNLP包含很多功能，github上有源码，github地址：Stanford CoreNLP，有需要的话可以下载看看。
主要内容在网站上都有描述，原文是这样写的：
Choose Stanford CoreNLP if you need:
- An integrated toolkit with a good range of grammatical analysis tools
- Fast, reliable analysis of arbitrary texts
- The overall highest quality text analytics
- Support for a number of major (human) languages
- Interfaces available for various major modern programming languages
- Ability to run as a simple web service
工具以及对各种语言的支持如下表（英文和中文支持的最好），分别对应：分词，断句，定词性，词元化，分辨命名实体，语法分析，情感分析，同义词分辨等。
| Annotator | ar | zh | en | fr | de | es |
|---|---|---|---|---|---|---|
| Tokenize / Segment | ✔ | ✔ | ✔ | ✔ | ✔ | |
| Sentence Split | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Part of Speech | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Lemma | ✔ | |||||
| Named Entities | ✔ | ✔ | ✔ | ✔ | ||
| Constituency Parsing | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Dependency Parsing | ✔ | ✔ | ✔ | ✔ | ||
| Sentiment Analysis | ✔ | |||||
| Mention Detection | ✔ | ✔ | ||||
| Coreference | ✔ | ✔ | ||||
| Open IE | ✔ |