Groupboard is a free online whiteboard that can easily be embedded into your own website, customized, and optionally self-hosted on your own server.
Logpasta is a simple, secure log paste service inspired by similar paste-hosting applications, trying to address a UX barrier when sharing output from terminal applications and scripts, by providing a cross-platform, open-source CLI tool.
Groupboard's answer
Online tutors and schools.
Groupboard's answer
Groupboard was the very first online whiteboard.
Groupboard's answer
Groupboard's answer
Groupboard can be embedded in your own website and customized.
Groupboard's answer
Groupboard is highly configurable and can be optionally embedded in your own website or self hosted on your own server.
Groupboard's answer
Javascript and C++.
Twiddla - Mark up websites, graphics, and photos, or start brainstorming on a blank canvas.
Pastelink.net - Anonymously publish text with hyperlinks enabled.
Smoothboard Air - Smoothboard Air is a collaborative interactive whiteboard application for iPads and Android devices that revolutionizes interaction in lecture rooms.
JustPaste.it - Want to share text with your friends? Paste it below and give them a link.
RealtimeBoard - RealtimeBoard is an online collaboration software created as a team collaboration and online brainstorming tool. It's super easy to use & free!
Pastebin.com - Pastebin.com is a website where you can store text for a certain period of time.