Pexels 免费图片
Millions of pictures. Check the license, but at time of writing: free to use no attribution required (but possible and
二维图形
关于计算机二维图形、色彩和艺术的一切
Pixabay 免费图片（以及视频和音乐）
2.3+ millions of royalty free images, movies and sounds. A must for any website or graphic user. Is sponsored by
Java TPoint教程
丰富的教程资源。号称 “学习技术的最佳门户网站”......虽然我们不一定同意以下观点
Paletton.com 色彩调色板设计师
帮助您选择下一组颜色：色轮上的 1、3、4 种颜色的各种组合。
Colormind.io IA 配色方案设计器
Not yet another color picker: no color wheel here, but lock colors you need and let other colors being proposed
HTML颜色选择器
Not exactly to chose the best-looking colors schemes, but rather to convert colors codes between the various formats Hex <->
迷宫生成器
Generate automatically a nice, almost any-size maze after selecting some parameters: the general maze shape (rectangular, circular, triangular, hexagonal) the
Pixlr.com 在线照片编辑器
Online photo editor, with no install and no registration required. Does all the basic photo editing: manages layers has some
Draw.io：在线流程图和图表制作工具
It has now be renamed draw.io, but same good usability and features. Very handy. Many options, blocks, and styles. Link
字体识别器
Provide your image, and the tool will try to identify the font used, or proposed the most approchant one. It