What you're lookin' for is an open source GNU licensed NLE. NLE stands for 'non linear editor'. Back in the olden days of 1999, when most video was still shot on analogue mediums (digital video tape is an analogue medium), people had to edit things in a linear fashion. Wanted to skip from frame 12,800 to frame 20,000? Well, you had to fast forward between frames 12,801 all the way to frame 20,000. Then digital happened, and you could edit things in a non linear fashion! Wanted to skip from the first frame to the last? Just punch in the time code for the last frame!
Time code is the universal defacto go-to numbering system for recording audio and video. Ever wonder how they keep all the audio and video in sync? Time code! The audio recorders and video are all synced to the same time code. You know those big ol' black and white clapperboards you see on behind the scenes footage? Those are called, Clapperboards! Folk in the video industry aren't clever at naming things. Board you clap before a scene? Clapperboard! Production that's done after you've shot? Post production! Before you shoot? Pre-production! Guy who makes sound effects? Sound designer! Guy who's in charge of wrangling all the sound on set? Production sound mixer! You get the idea. Though 'blocking', doing a dry run of a scene before you shoot, is sort of a weird name. So is a 'gaffer'. A gaffer is the lighting person. But for the most part, they calls 'em like they sees 'em.
On Clapperboards you write down the scene number, and the time code. Time code is read as HH:MM:SS:F. Hours, minutes, seconds, frames. So at the end of the day when everything's all sequestered and organized and it's time to do some editing, and someone says 'Hey man, we need to get a rush on scene A538' you load up the audio, the video, double check the time code and scene name on the clapperboard, make sure they're in sync with the time code, and bam, everything's where it should be.
With that lesson about things you're not looking for out of the way, how 'bout some open source, free video editors? There's AVIDemux, which I have never ever ever had any luck with and I loathe passionately. Some people can make it work, not me. If you want to try it out, here it is;
http://www.avidemux.org/There is also Lightworks, which is a free NLE and is not AVIDemux. I don't like it. It's cumbersome and fussy and it makes me want to throw things at things, here that is;
http://www.lightworksbeta.com/I also loathe editing video. If you have me editing video even in something like Vegas, I'm going to be irritable. So when I say I don't like a video editor, it means nothing, because I don't video editors, and I don't like editing videos!
I'd go with Lightworks.