db4o is an object database for Java and all .NET environments. Its features include ACID transactions, automatic class schema recognition, query-by-example, a S.O.D.A. object querying API, native queries, LINQ support on .NET, callback methods, memory files, cascade-on-delete, multi-threaded access, and Java Webstart and servlet support.
FusionCharts Free is a flash charting component that can be used to render data-driven and animated charts for your Web applications and presentations. It is a cross-browser and cross-platform solution that can be used with ASP.NET, ASP, PHP, JSP, ColdFusion, Ruby on Rails, simple HTML pages, or even PowerPoint presentations to deliver interactive and powerful flash charts. You do not need to know anything about Flash to use FusionCharts. All you need to know is the language in which you're programming.