Avidemux!

HandBrake is an open-source, multithreaded video transcoder- it converts digital media from one format to another, compressing the files in the process. Handbrake can rip encrypted DVDs with libdvdcss (libdvdcss is installed with VLC media player on Mac OS X, or AnyDVD/DVD 43 on Windows).

OpenShot is a open source video editing program.

Kdenlive is an intuitive and powerful multi-track video editor compatible most recent video technologies. It is completely free, and open-source as defined by the GNU foundation.

Shotcut is a free, open source, cross-platform, non-linear video editor.

VirtualDub is a video capture/processing utility for 32-bit and 64-bit Windows platforms (98/ME/NT4/2000/XP/Vista/7), licensed under the GNU General Public License (GPL). It lacks the editing power of a general-purpose editor such as Adobe Premiere, but is streamlined for fast linear operations over video. It has batch-processing capabilities for processing large numbers of files and can be extended with third-party video filters. VirtualDub is mainly geared toward processing AVI files, although it can read (not write) MPEG-1 and also handle sets of BMP images. »

Complete suite for editing, color correction and professional audio post production, all in a single application.

Lightworks is an editing powerhouse, delivering unparalleled speed and flexibility, fully integrated with the other members of the Complete Collaboration family.

PiTiVi is an open source non-linear video editor, written in Python and based on GStreamer and GTK+.

XMedia Recode can convert nearly all popular audio and video formats including 3GP, 3GPP, 3GPP2, AAC, AC3, AMR, ASF, AVI, AVISynth, DVD, FLAC, FLV, H.261, H.263, H.264, M4A , M1V, M2V, M4V, Matroska (MKV), MMF, MPEG-1, MPEG-2, MPEG-4, TS, TRP, MP2, MP3, MP4, MP4V, MOV, OGG, PSP, (S) VCD, SWF , VOB, WAV, WMA and WMV.

Final Cut Pro provides non-linear, non-destructive editing of any QuickTime-compatible video format including DV, HDV, P2 MXF (DVCProHD), XDCAM (via plug-in), and 2K film formats. It supports a number of simultaneously composited video tracks (limited mainly by video format and hardware capability); up to 99 audio tracks; multi-camera editing for combining video from multiple camera sources; as well as standard ripple, roll, slip, slide, scrub, razor blade and time remapping edit functions. It comes with a range of video transitions and a range of video and audio filters such as keying tools, mattes and vocal de-poppers and de-essers. It also has a manual 3-way color correction filter, videoscopes and a selection of generators, such as slugs, test cards and noise. »

VideoPad is a professional video editing application which allows you to create movie projects from various video clips or a single video file. It also allows you to import a wide variety of audio and video file formats including .avi, .wmv, .3gp, .wmv, .divx and many others.

Simple, cross platform video editor for lossless trimming / cutting of videos. Great for rough processing of large video files taken from a video camera, GoPro, drone, etc. Lets you quickly extract the good parts from your videos and discard GB of data without losing quality. It doesn't do any decoding / encoding and is therefore extremely fast. Also allows for taking JPEG snapshots of the video at the selected time. This app uses the awesome ffmpeg for doing the grunt work. Also supports lossless cutting in the most common audio formats. »

VSDC Video Editor allows you to apply audio effects and filters to audio tracks in video and audio files. Here are some of the most popular ones: sound normalization, volume correction, echo, reverberation, equalizer and others.