General Information on word embeddings
For a general explanation look here:
Made by Google, uses Neural Net, performs good on semantics.
Installation + getting started:
pip install gensim
Here are some of the things you can do with the model: 
Here is a bit of background information an an explanation how to train your own models: .
Made by Facebbok based on word2vec. Better at capturing syntactic relations (like apparent ---> apparently) see here:
Pretrained model files are HUGE
pre trained models
- https://github.com/Kyubyong/wordvectors: Word2Vec and FastText, Multiple languages, no english, trained on Wikipedia
- https://github.com/3Top/word2vec-api Mostly GloVe, some word2vec, English, Trained on News, Wikipedia, Twitter
- https://github.com/facebookresearch/fastText/blob/master/pretrained-vectors.md: Fasttext, all imaginable languages, trained on Wikipedia