在线工具收集

• 在线开发工具集

Graph

• Drawing.io
• ASCIIFlow Infinity
• Gliffy | Online Diagram and Flowchart Software
• ProcessOn

REPL

• repl.it
• Free Online IDE and Terminal
• Java REPL
• Try Ruby: learn the basics of the Ruby language in your browser.

Codec

Hash function generator

• SHA1 and other hash functions online generator

Url Decode

• UrlDecode.org
• URL Decoder/Encoder

Image

• Shape Shifter SVG 动画

Regex

• Rubular: a Ruby regular expression editor and tester

Pastebin

• Gist - GitHub
• ShareText|分享文本

Editor

JavaScript

• JsBeautifier - Online JavaScript beautifier

JSON

• JSON Editor Online

Source/Doc Ref

• Developer Docs - API Documentation
• GrepCode.com - Java Source Code Search 2.0
• Ruby Documentation Search - Omniref

Rest API Doc Writer

• Apiary - Build beautiful APIs
• API Doc - Inline Documentation for RESTful web APIs