I recently discovered the open source Yet Another Process Monitor (YAPM), I don't like the fact that it requires .NET 3.5 (not a problem on my desktop, but might be a problem on some servers). I'm also not a big fan of the office 2007 style UI.
Interesting features:
Remote process viewing via WMI or its own server. I have not experimented with either of these but will.
A panel to view tasks like in Task manager. I actually might take a peak at the source code to see how one lists tasks via the windows API.
I prefer Extended Task Manager. DTaskManager is also ok.
I recently discovered the open source Yet Another Process Monitor (YAPM), I don't like the fact that it requires .NET 3.5 (not a problem on my desktop, but might be a problem on some servers). I'm also not a big fan of the office 2007 style UI.
Interesting features:
CurrProcess is nice (lighter than PE).
It might be helpful to know what problem you're trying to solve. Process Explorer is pretty comprehensive.