As promised, here is a high quality replacement for Trace and the old subspy plugin. This one was a huge chunk of work. While based on old subspy and intended to be kept similar to the way many were used to how the old app worked, it received pretty much 90% freshly composed code underneath the hood. It is slimmer, faster, much more simple to use and has been profiled and tested rigorously. The app is available for free in-world at the Virtual Disgrace™ Mainstore and for a limited time also at The Temple of the Collar on the eastern wall. If you like, there is also an app with costs that will support the people who are working on it and who will fix things in the future.
Please be aware that both apps are fully equal to each other. The app with costs and free one are exactly the same. Everything else you like to know and support for the new app can be found here.