Offline database of synonyms/thesaurus

English verb conjugations

📦 English inflection library for noun (plural to singular and singular to plural), verb (gerund, present & past) and adjectives (comparative & superlative) transformations/conjugation.

Pluralize or singularize any word based on a count

English grammar

English grammar checker code

Prefix a noun with an indefinite article - a or an - based on whether it begins with a vowel

The CMU Link Grammar natural language parser

Extract and align grammar patterns from English sentences.

The Open Source Dictionary

Open-Source Queryable Formatted English Dictionary, in multiple formats based on The Online Plain Text English Dictionary (OPTED) dictionary

The Open English WordNet

Lexical database of any language

Open German WordNet