Apparantly I changed this blog posting instead of posting a new one, therefor this posting seems changed, it's not. :)
Below is a screenshot of the application, LLBLGen Pro, I've been working on for the past 6 months. LLBLGen Pro is the big brother of the DAL generator LLBLGen and generates a complete O/R mapper.
Click to enlarge
At the left you see the entities found automatically by the tool and all the relationships which are detected and added automatically (in other words: you add all these entities and their relationship definitions with 2(!) mouseclicks). In the middle you see the current state of the entity definition editor (not finished yet). Any change made is reflected directly in the project explorer at the left, everything related is updated, including the relations. At the right you see the catalog explorer, which lets you browse through all the schemas in the catalog of the project, including all tables, fields, stored procedures, resultsets and views.
LLBLGen Pro is released later this summer.