Chnorm is a simple command line utility for setting the owner, group, and the mode of given files and directories on a per file/per directory basis, recursively. It is especially useful if you often copy files with brain-dead permissions from filesystems not supporting the Unix permission scheme. It detects executables based on their contents and sets their permissions accordingly.
Asymptopia Linux Process Tool is a script which runs from a terminal and accesses the /proc filesystem through a simple text interface. It has a menu of commands for monitoring and getting information about processes. If installed in your path, you can also simply issue the command "proctool [program2kill]" and all instances of the specified program are killed.