Great Downloader easy to use can convert into multiple file formats. Fast and impressive
Boilsoft Video Joiner - Boilsoft Video Joiner is a powerful video merger to join AVI, MPEG, MPG, VOB, RM/RMVB, 3GP, ASF, WMV, WMA, MP4, MP4A, MKV or FLV files, and so forth.
Video DownloadHelper - Browser extension to download videos from the Web
Free Easy Video Joiner - easy video joiner free download - Easy AVI/MPEG/RM/WMV Joiner, Easy Video Joiner for Windows 10, Unlimited Video Merger Joiner - Easy Video Joiner, and many more programs
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
MKVToolnix - MKVToolnix is a set of tools to create, alter and inspect Matroska files under Linux, other Unices...
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.