| Reuters 50-50 | C50.zip |
| Stopwords in MySQL | MySQL stopwords |
| Onix Text Retrieval Toolkit | Stopword list |
| Ranks.nl small | stopwords-short.txt |
| Ranks.nl medium | stopwords-medium.txt |
| Ranks.nl large | stopwords-long.txt |
| MySQL | stopwords-mysql.txt |
| Onix | stopwords-onix.txt |
| Porter Stemming Algorithm | Official Web Page |
| Porter Algorithm original paper | def.txt |
| Porter Algorithm in Java | java.txt |
| Porter Algorithm in Python | python.txt |