there are many loadtesting tools here.
replays a single apache log piped into it delaying requests to occur at the same rate they did. takes a single argument, the host to make the request to. A cookie can be copied into line 22 to make authenticated requests
takes a list of files on standard in takes one or two regexes as arguments. with one regex it will cut all matching lines with two regexes it will cut from the first occurance of the first to the first occurance of the second calls apache_load_test.js with this cut and the host as the test. version of the filename