Apps to Keyframe animation

Olive Video Editor is a powerful, open-source, non-linear video editor designed for professionals and enthusiasts alike. It offers a robust set of tools for cutting, merging, color grading, and applying effects, all within a intuitive interface. Being cross-platform and ad-free makes it a compelling alternative to commercial software.

LiVES is a powerful open-source video editing and VJing software designed for users of all skill levels. It offers a comprehensive suite of tools for both linear and non-linear editing, real-time video effects, and synchronized audio manipulation, making it suitable for creating everything from simple home movies to complex visual performances.

ENIGMA is an open-source game development platform and compiler, coupled with the LateralGM IDE. It allows users to create 2D and 3D games using a flexible scripting language and visual programming tools, offering compatibility with existing Game Maker projects and supporting cross-platform deployment.

Art of Illusion is a versatile, open-source 3D modeling and rendering studio built on Java. It provides a comprehensive suite of tools for polygon and subdivision surface modeling, procedural textures, and a powerful animation system. It's a great option for artists and designers looking for a free yet capable solution.

OpenToonz is a powerful, open-source 2D animation software widely used in professional studio production and by independent artists alike. It offers a comprehensive suite of tools for vector and raster drawing, frame-by-frame animation, bone rigging, complex effects, and scanned drawing cleanup.

K-3D is a powerful and free 3D modeling, animation, and rendering software. It offers a flexible plugin-oriented architecture for creating complex 3D scenes and animations.

Cinelerra is a powerful, open-source non-linear video editing and compositing software designed for Linux. It offers a comprehensive suite of tools for editing professional-quality video, including advanced keyframe animation, color correction, chroma keying, and audio processing.

Natron is a powerful, free, and open-source nodal compositing software designed for creating complex visual effects and motion graphics. Inspired by industry-standard tools, it provides a flexible and extensible environment for artists.

Synfig Studio is a powerful, free, and open-source 2D animation software designed for creating high-quality, professional-looking vector animations. It offers a timeline-based workflow, extensive control over layers and parameters, and support for various animation techniques, making it a robust tool for artists and animators.

Shotcut is a free, open-source, and cross-platform video editor offering a wide array of features for both beginners and experienced users. Supporting numerous formats and providing non-linear editing, it's a powerful tool for video creation without watermarks or license fees.

Kdenlive is a powerful, free, and open-source non-linear video editor built on the robust MLT Framework and KDE. It provides a comprehensive suite of tools for video editing, from simple cuts to complex multi-track compositions.

OpenShot Video Editor is a powerful yet simple free and open-source video editor available for Windows, macOS, and Linux. It offers a user-friendly interface and a comprehensive set of tools for creating and editing videos, supporting a wide range of formats and codecs.