TVPaint offers a free trial version on their official website. It has no time limit, but you cannot save or export. It is the best way to learn the tools before investing.
TVPaint 10 Pro is generally lightweight compared to modern 3D software. However, it is CPU-intensive. It does not rely heavily on GPU acceleration. It handles massive resolutions well, provided you have enough RAM.
A fork of OpenToonz, Tahoma 2D is designed to be more user-friendly for beginners and independent animators while retaining the powerful features of its parent software. Conclusion
Like TVPaint, Krita is bitmap-based, making it excellent for textured, hand-drawn, traditional animation styles. Cost: 100% Free. 2. Opentoonz (Free & Open Source)
This is the software's biggest hurdle.