• ConTeXt
  ConTeXt wiki. In some ways more advanced than LaTeX, but probably doesn't support packages for doing phonological rules, etc.
  and context contextgarden document excursion first from hello ho html latex lists mailing main minimals page translations world
  in Software > Text > TeX and LaTeX with context latex tex by 3 users
• Search tools look for context
  
  Attempting to improve the accuracy of corporate information retrieval technology, several vendors are incorporating techniques designed to identify people, proper names, and places buried within text and analyze relationships between those assets.
  in Organizations > LDC > Tides with context ldc organizations search tides tools

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