With Bridge/Lemmatizer you can create a lemmatization spreadsheet for any Latin or Greek text. To begin, either upload a .txt file or just paste the text. Lemmatizer will match all the words that have only one possible lemma, and will return a csv file for you to complete. All you have to do is disambiguate the remaining words and you have a fully lemmatized text. You can also add custom definitions and/or principal parts!