https://onepagelove.com/ Templates free
https://www.free-css.com/free-css-templates templates free
https://bootswatch.com Themes customizados Bootstrap scss css
https://bootstrap.build Themes de templates free Customizador de Theme
https://colorlib.com Themes e templates
https://themewagon.com Templates Html gratuitos
https://templatemo.com Templates html
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https://bootstrapmade.com Templates Bootstrap
https://startbootstrap.com Themes e templates start bootstrap
https://www.photopea.com Editor gráfico e conversor de extensão xd online
https://bitbucket.org Ferramenta online de gestão de repositorios
https://convertio.co/ conversor de imagens, video, audio, documentos...
https://devdocs.io Resumo de linguagens e frameworks
https://www.freeformatter.com formatação encoders e decoders
https://ianlunn.github.io/Hover/ Coleção de efeitos em CSS3
https://www.cleancss.com Várias ferramentas para desenvolvimento web
https://www.layoutit.com Builder de estrutura básica bootstrap online
https://materialdesignicons.com Coleção de icones para download, png, svg, icon
https://www.favicon-generator.org/image-editor/ Editor de imagem online
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https://www.htaccessredirect.net Gerador .htaccess
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https://www.unixtimestamp.com Conversor timestamp
https://www.cleancss.com/router-default/ Senhas padrões de router
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https://animate.style Animações em CSS
https://devhints.io Cheatsheets
https://docs.emmet.io/cheat-sheet/ Cheat-sheet Emmet
https://codepen.io code online
https://devchallenge.vercel.app Desafios de desenvolvimento back, front e mobile
https://www.frontendmentor.io Desafios front end
https://www.codewell.cc Desafios front end