W3C HTML
W3C's easy-to-use markup validation service, based on SGML and XML parsers.
IT之家
IT之家,百度指数排名第一的前沿科技门户网站,青岛软媒旗下。快速播报科技行业新闻头条快讯和手机数码产品评测,关注智能车电动车、AR/VR虚拟现实、苹果iOS/iPadOS、鸿蒙OS、谷歌Android、微软Win11/Win10/Win7,紧盯iPhone/iPad、安卓智能设备手机等数码潮流。提供技术攻略教程、壁纸和App软件游戏资源下载。
VisualHunt
收录着大量免费图片,号称超过三亿张!关键是它可以通过颜色来查找图片,无须注册、登入,即可在线下载图片。
腾讯科技
24小时滚动报道互联网,IT,通信、家电及科学探索行业新闻,腾讯科技频道致力于提供最快捷、最鲜活的IT产业资讯,第一时间报道行业重大事件,重点解读产业背后人物故事,全面关注新闻热点话题。以独特的视角、犀利的报道风格,揭示IT产业走向。
Webdesigner Depot
Web Design Resources for Web Designers. We include Photoshop Tutorials, WordPress Plugins, and Web Development tools. Download free icons, Photoshop brushes and tools for web and graphic designers.
CatsWhoCode
This is the blog overview page of CatsWhoCode. Here you can find the latest tips, tricks and hacks about coding, web hosting, design and more.
StockSnap
The best source for free, CC0, do-what-you-want-with stock photos. Browse and download thousands of copyright-free stock images. No attribution required.
Smashing Magazine
https://www.smashingmagazine.com/