Click on the following links. Please note these will open in a new window.

• WordNet::Similarity
  A Perl package that implements several word relatedness measures on WordNet
   

• NLTK 
  Python implementation of several relatedness measures in WordNet

• Gensim
  A Python implementation of LSA

• word2vec 
  A pre-trained word embedding model made available by Google, with 3 million 300-dimension vectors for words and phrases

• Semeval
  http://alt.qcri.org/semeval2016/
  http://alt.qcri.org/semeval2015/
  Evaluation exercises including several word and text similarity evaluations