AZRhymes - Free online rhyming dictionary for writing lyrics.

Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.

Lazyjot - Modern web-app editor for writing lyrics

Celtx - Celtx is a scriptwriting software platform with applications in a wide range of mediums but that specializes in helping screenwriters.

Rhyme Zone - Rhyme Zone is a platform that enables the users to search words in different areas just like a dictionary but an advanced one.

Scrivener - Scrivener is a content-generation tool for composing and structuring documents.