OCCRP is currently the principal developer of Aleph. The organisation is focussed on unveiling cases of large-scale corruption, mainly in Central and Eastern Europe, Africa and Latin America. OCCRP Aleph is probably the largest instance of the software, containing over 1000 datasets - public records, open data, but also leaks and informal data.
OpenOil is a Berlin-based startup that provides insight into the extractive industries. OpenOil operates an Aleph instance that crawls multiple regulatory databases, including the US, Canadian, British and Australian stock filing systems and indexes all documents pertaining to natural resources.
OpenOil also created this lovely trailer video: