Avoid installing SoundFlower if you are using Mavericks. SoundFlower version 1.6.6 beta is not compatible with Mavericks.
I just went through three (3) days of my MacPro suddenly crashing and automatically restarting more than a dozen time due to this culprit. It is an extension (kext) that gets loaded into your System's Library folder.
Every Panic Report that I sent to Apple pointed out that SunFlower's extension was the cause, but it took a long phone call with a smart Senior Level tech support at Apple to read the Panic Reports I sent her and interpret what they meant.
She said that there are several Apple discussions identifying SoundFlower as the culprit for crashes in Mavericks. I did not read them, but I take her word for it.
To eliminate SoundFlower, or as she put, "nuke it from orbit," use these commands in Terminal, one after the other, then Restart your Mac:
sudo kextunload /System/Library/Extensions/Soundflower.kext
sudo rm -r /System/Library/Extensions/Soundflower.kext
I have had SnapZ Pro installed on my systems for years without problems, but I believe that the version 1.6.6 beta version of SoundFlower, which I recently downloaded and installed as an "upgrade" caused havoc in my Mac Pro due to its inability to play nice in Mavericks.
A separate File Buddy search for "SoundFlower" reveals that the application, its receipt files, its .plist files, and its fellow travelers still reside on my hard drive. So, I will have to remove all traces of the application and its cousins independently of running the SUDO commands, which are the only way to eradicate the extension that will plague you to death from the system's memory.