* standalone stream processing engine ("event sourcing", "complex event processing") that can run queries (similar to how relational database runs SQL queries)

* standalone stream processing engine ("event sourcing", "complex event processing") that can run queries (similar to how relational database runs SQL queries) and works in publish-subscribe mode, one that is not a proof-of-concept by some researcher, but actually working software * database for system logs (JSON documents) that is not as brittle as ElasticSearch and not as big of a memory hog * topic map engine usable from Perl or Python