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- https://www.freecodecamp.org/
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- https://digitalinnovation.one/
- https://www.rocketseat.com.br/discover
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- https://cssbattle.dev/
- https://cssgridgarden.com/
- https://flukeout.github.io/
- http://www.flexboxdefense.com/
- https://codepip.com/
- https://animate.style/
- https://www.shapedivider.app/
- https://getwaves.io/
- https://easings.net/pt-br
- https://cubic-bezier.com/#.17,.67,.83,.67
- https://animista.net/
- https://bennettfeely.com/clippy/
- https://nekocalc.com/
- https://studio.code.org/courses
- https://www.hackerrank.com/
- https://www.beecrowd.com.br/
- https://sudoku.club/
- https://www.chess.com/pt-BR/play/computer
- https://rachacuca.com.br/
- https://www.codewars.com/
- https://leetcode.com/