Typito - Web based drag-and-drop tool to create engaging videos with beautiful typography, images and brand layouts.
i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Mock - Instantly create video mockups from screen recordings
Fluxbox - Fluxbox is a window manager for X that was based on the Blackbox 0.61.1 code.
Rocketium - A DIY video creation platform. Make videos in minutes using preset themes and templates.
Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.