How do you sync two audio clips without a clapper board?

Question

... so the cameras had to be well back to catch the whole shot, and to catch the sound, we used a separate audio recorder closer to the performers.
In hindsight, I suppose we could have used a clapper board but if the board was close to the recorder, it would be hard to see... and if it was closer to the cameras, it would be hard to hear the clap on the recorder.
now the question is how to perfectly sync the better audio from the recorder with the lesser audio from the cameras (then delete the lesser audio)
so far, its not quite right and their lips are off like an old Japanese Sci Fi Movie. Is there any way to move one track frame by frame over the other to get it right? (some sort of keyboard command?)
OR is there some sort of app that someone wrote that could overlay the the good audio with the reference audio and sort of "snap it" into position? The waveforms look similar aside from the quality and strength of the signals.

Answer 1

Rob, Andy
just wanted to revisit this post. Were onto something great here!
so to update us, I DL'ed "PluralEyes" but it didn't work. Each time I pointed it at the program file, it shut itself down. I tried rebooting the whole machine, trashing preferences etc but it wouldn't work.
the developers were great! got back to me asap. I sent the crash reports and the file I was working on and they discovered a "huge bug"
Today, they emailed me a link to a FIX which be included in their next version but they allowed me to try it today and guess what? it FIXED it!
So I started the app and let it run (its over 2 hr program) the app ran for like an hour and put out two new sequences, "unsynced" and "synced"
but i have some questions;
there were two cameras and a separate audio recorder.
in "synced" it lined up the recorder audio with the camera 1 audio but it pushed camera 2 and its audio to the side (further down the timeline)
of course, what we want is for camera 2 to also be synced (or sunk;-) so when we cut between cameras, the lips are still in sync.
now how do we get it to line up camera 2?
screen shot.
in the "synced" sequence, we need to sync camera 2 with camera 1.
also, it has left out much of the program in the "synced sequence" there are actually three tapes from each camera. you can see here that we are left with one tape from each camera.
what do we do from here?
also, before moving anything around, I can link the tracks but that doesnt stop them from getting out of sync. and locking the tracks means they cannot be moved. so how do you attach the audio to video without getting out of sync?
.... In the "good ol days" (so Ive heard) editors had years and years to master their craft. Film & Splicing were in power for like what? 75 years?
Now there are new programs emerging every day with entirely their own learning curve! But if this works just this once, its well worth buying it! its a fantastic app! Im sure it just takes some getting used to!