Forse ne avevo già parlato, ma visto che ogni tanto sui
newsgroup mi ritrovo a postarli, li segnalo anche qui...
Complimenti all'autore, e al fatto che sono tutti freeware:
Developer Playground
The whole idea of Developer Playground is
simple: Allow hooking of arbitrary processes and tracing of every call to any
DLL, without the overhead of a debugger.
ieHTTPHeaders
ieHTTPHeaders is an explorer bar for IE, that
shows HTTP Headers sent back and forth your IE browser.
ComTrace
ComTrace will intercept calls to your
COM-components, calls to the COM library, on a per-process basis, and trace
them for you.
Browse2Target
As simple as it gets;
Browse2Target will add a new menu item, "Browse Target Folder", to your Visual
Studio 2002/2003 Tools menu. Upon selection, it will open the Windows Explorer
and point it to the target folder (Debug/Release) for the current project. [Browse2TargetSetup]
RunAsLimitedUser
The end of an era. The first app I've
published (with the exception of Browse2Target, but that doesn't count), not
to use funky API-patching, COM-Interception and other weird stuff. This
utility is my way of sandboxing applications I don't trust. Read more here...
Soprattutto ieHTTPHeaders mi serve molto
quando devo collegarmi via codice a siti che non espongono web services... 
Li trovate tutti qui: http://www.blunck.info/