Add Zerker

[aliaszz]

Please read How to contribute before creating a submission.

Description

Zerker is a flexible and lightweight flutter canvas graphic animation library.

With Zerker, you can create a lot of seemingly cumbersome animation effects, such as animated animations, pop-up animations, scene transitions, icon effects, and more.

At the same time, you can create a lot of simple games with Zerker. Zerker contains elements such as sprites, scrolling backgrounds, and atlases, making it easy to create game worlds with them.

https://github.com/flutterkit/zerker

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Checklist

• I read How to contribute
• I edited the SOURCE.md file only
• Added a link to the repo in the PR

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