- Inverted Index and Boolean Retrieval Model Here
- Positional Index and 2 Phrase Query Search Here
- Vector Space Model with Top-K Retrieval through Cosine Similarity, Champions List, Cluster Pruning Index Here
- Vector Space Model (using PyLucene) with Top-K Retrieval through Cosine Similarity Here
- Pagerank Algorithm with Power Iteration (Google's Formulation) Here