The document lists various websites for HTML viewers, Bootstrap alternatives, templates, documentation sites showing examples and code for components, tools for editing images and converting between formats, and more resources for front-end development. Many of the links are for online code editors, HTML viewers, Bootstrap documentation and examples, CSS frameworks like Materialize and Tailwind, and tools for working with images and PDFs.

1. Visores HTML
https://codebeautify.org/
https://jsfiddle.net/grcwfLvk/2/
https://jsonformatter.org/html-viewer
http://www.cubicfactory.com/jseditor/ewutuc/113/edit
https://www.tutorialspoint.com/online_html_editor.php
https://htmleditor.io
https://htmled.it/or/
visual studio code (podría ser
codopen.io
https://getbootstrap.com/docs/4.3/components/buttons/
https://getbootstrap.com/docs/4.3/getting-started/introduction/
https://ciberninjas.com/bootstrap-alternativas/
PLANTILLA PARA DESCARGAR O COMPRAR
https://get.foundation/templates.html
SITIOS QUE DAN CATEGORIA Y MUESTRAN EJEMPLO GRÁFICOS Y CÓDIGO
https://codingpotions.com/desarrollo-web-boostrap
https://uniwebsidad.com/libros/bootstrap-3
https://www.tutorialesprogramacionya.com/bootstrap4ya/
https://www.uv.es/jac/guia/indice.htm

2. https://www.uv.es/jac/guia/estilo2.htm
https://materializecss.com/badges.html
https://element.eleme.io/#/es/component/checkbox en español
https://firezenk.github.io/zimit/started.html
https://purecss.io/start/
https://tailwindui.com/components?utm_source=tailwindcss&utm_medium=navigation
https://unsemantic.com/css-documentation
https://getuikit.com/docs/accordion
https://getbootstrap.com/docs/4.3/getting-started/introduction/
https://bulma.io/documentation/components/menu/
https://tailwindui.com/components/marketing/elements/headers
https://groundworkcss.github.io/groundwork/docs/home.html
HERRAMIENTAS PARA EDICIÓN
https://www7.lunapic.com
https://www.pdf2go.com/es/pdf-a-word
https://pdf2doc.com/es/
https://www.ilovepdf.com/es/word_a_pdf
https://smallpdf.com/es/word-a-pdf
PARA DESCARGAR IMAGEN