great resource for learning html/css on your own. has a page on everything, with interactive code boxes u can mess around with. they also have an accessibility guide and other helpful information

similar resource to W3 schools. I don't prefer it but it has a the same information.

teaches you how to code in an interactive way. I havent used this but they have a free plan so check it out ig. also provides other programming languages!

does as it says. checks for any unclosed tags

a site you can use to check accessibility when making your website! it will point out what needs to be changed. it is free, but they also offer paid services. This site is mostly for businesses but still helpful

use a color picker to make a gradient for css

the code editor i like to use. has github stuff if you're like that... also lots of themes and plugins. very customizable! for windows, linux, and mac.

free guestbook service

what i use for the "online now" and "visitors" counters

embed an updatable status onto your website! its mostly customizable with css but there are some quirks