ExactWord 

ExactWord (formerly YTSEditor) is a word processor editor with Rich Text/Plain Text editing, Spell Check, ActiveSpell, Thesaurus, Dictionary, Paragraph Options, Format Styles. Dictionary Update Wizard automates adding more spelling dictionaries.
text editor rich text spell check spell checker spellcheck word processor spell checking software free dictionaries thesaurus thesauri spanish british danish dutch

EditExt 

EditExt (formerly EditorPro) is an advanced multi-tabbed editor for programmers & text editing, with spell check, syntax highlighting for 9 different programming languages. Dictionary Update Wizard automates adding more spelling dictionaries.
text editor syntax highlighting spell check word processing thesaurus spanish british danish dutch english french german italian norwegian