.Net Memory Profiler
.Net Memory Profiler is a single C# class that builds a tree of specified object's fields, their sub-fields and so on up to primitive types. And in the "Quick Watch" window of the Visual Studio you will be able to see the memory usage by each of those fields. For more details see screenshots.
MonitorJMX is a very small web application capable to monitor WebLogic Servers/Cluster using a single JMX connection. Two JSP dashboards are available in this first version: servers and jms.