Google Chart API

Developer's Guide - Google Chart API - Google Code - 圖比excel的好看


Mr./Ms. Days (MMDays) - 網路, 資訊, 觀察, 生活 » Blog Archive » 用網址畫圖，Google 推出 Google Chart API
unofficial google rounded corner api
Charts And Graphs: Modern Solutions | Developer's Toolbox | Smashing Magazine
update: there are many tools generating charts visually
Chart Maker - Generator for the Chart Server API
Online Charts Builder
update:
這邊有人寫了一個簡單的proxy把request cache起來
Wait till I come! » Blog Archive » Generating charts from accessible data tables and vice versa using the Google Charts API