Task-Switcher will let you list your running applications, tell you how big they are in terms of memory usage, close applications, switch to an application even if it is not a graphical one. In short you regain the "Open Programs" utility.

TaskSpy allows you to get more control and information over running tasks on your mobile phone. You can quickly switch tasks, kill processes and threads or free unused memory, as well as display detailed information about system resources.