Great Downloader easy to use can convert into multiple file formats. Fast and impressive
LRTimelapse - LRTimelapse 5 - the best solution for time lapse editing, keyframing, grading and rendering. Supports Windows, Mac, JPG and RAW from any Camera.
Video DownloadHelper - Browser extension to download videos from the Web
Time-Lapse Tool - Time-Lapse Tool allows to make a time-lapse video in just few clicks.
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
FrameByFrame - Stop motion for mac.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.