Google for them and you will find info like below.
igfxtray - igfxtray.exe - Process Information
"Process File: igfxtray or igfxtray.exe
Process Name: Intel(R) Graphics Accelerator Helper
igfxtray.exe is a process which allows you to access access the Intel Graphics configuration and diagnostic application for the Intel 810 series graphics chipset. This program is a non-essential system process, and is installed for ease of use via the desktop tray. "
hkcmd - hkcmd.exe - Process Information
"Process File: hkcmd or hkcmd.exe
Process Name: Intel Hotkey
hkcmd.exe is installed alongside Intel multimedia devices and allows configuration and diagnostic options for these devices. This program is non-essential process to the running of the system, but should not be terminated unless suspected to be causing problems."
ashDisp - ashDisp.exe - Process Information
ashDisp.exe is a part of the Avast Internet security suite. This utility forms an important part of your computers protection against Internet-bound viruses and worms, and should not be terminated."