Apache CouchDB is a distributed, fault-tolerant and schema-free document-oriented database accessible via a RESTful HTTP/JSON API. Among other features, it provides robust, incremental replication with bi-directional conflict detection and resolution, and is queryable and indexable using a table-oriented view engine with JavaScript acting as the default view definition language.
Elvyx is a tool designed to monitor and profile the jdbc activity.
P6Spy is an open source framework for applications that intercept and optionally modify database statements
a UML modeling tool and get the schema diagr
