Lockpicker is essentially a GUI frontend to hashcat, an advanced password recovery utility. Using lockpicker, you can recover a password from its hash straight from a modern GNOME-native interface without the hassle of dealing with hashcat syntax. Lockpicker is meant for academic purposes, and is an ideal tool to start learning about password recovery or to work with CTF (capture the flag) assignments.
Note that Lockpicker ships with vanilla Hashcat, and does not provide any functionality that is not available from hashcat itself. However, you can easily provide your own wordlists or hashcat modules or kernels from the GUI.
Hotfix update, fixes an issue with certain attacks not working due to invalid parameters.