Systems of type None

• Collins' statistical parsers

• fnTBL

• ThoughtTreasure

• FLAP

• CLaRK

• GATE

• Charniak's statistical parsers

• Research Prototype: SPUD

• Robust Accurate Statistical Parsing Toolkit (RASP)

• Ellogon

• SProUT

• Pstone

• The Quipu Grok Library

• Alembic