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To learn from good examples, what are the best open source Google App Engine applications out there?

I don't care if it is Java or Python based.

Please one app per answer. Feel free to add a link to the live app (if there is) and to the project page.

flybywire
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    That may be useful as a reference http://groups.google.com/group/google-appengine/web/google-app-engine-open-source-projects – kristof Oct 01 '09 at 09:28

12 Answers12

13

Rietveld of course

fuentesjr
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    +1 nice. a code review tool for the web written by Guido van Rossum – flybywire Oct 01 '09 at 09:37
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    A couple of days after reading your answer I totally accidentally found myself reading the Rietveld source for guidance. So I had to come back and give you a +1 :) For the record, it is a good place to see how to make a straight-up Django app on AppEngine (i.e. no app-engine-patch). It is always updated as opposed to the docs (e.g. they are already using Django 1.1). – JasonSmith Oct 06 '09 at 11:07
  • Also they have useful middleware to attach the current user to the request using the google user API. – JasonSmith Oct 06 '09 at 11:07
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I dearly love my App Engine Console. It is a mini-app, a "plug-in" for other applications. It gives you an AJAX Python interpreter that runs on the server—great for development and debugging. Sometimes I use cURL pointed at App Engine Console to run (authenticated) one-off remote Python procedure calls.

(I wrote it, yes, but I use it daily for maintenance of busy sites. It's the first tool I install on new projects and I don't know how I could live without it.)

JasonSmith
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UserInfuser, a gamification platform: http://code.google.com/p/userinfuser and https://github.com/nlake44/UserInfuser

It can help you add gamification elements to your website (badges and leaderboards). It uses the Channel API for badge notifications.

Navraj Chohan
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3

Khan Academy. One of App Engine's bigger customers. https://khanacademy.kilnhg.com/Repo/Website/Group/stable/Files

Navraj Chohan
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2

JaikuEngine is probably Google's biggest open source App Engine project.

RyanW
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2

I really like FoFou which is a simple forum software that I have used.

FoFou is open source and hosted on github.

AndyL
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Partychapp is a Java GAE app using the XMPP services to allow users to create and join chatrooms together.

Jason Hall
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I really like Bloog, a simple blogging application. Source is on github.

JJ Geewax
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1

OpenShare (http://openshare.emotionull.com)

http://bitbucket.org/jonromero/openshare/src/

Jon Romero
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StackPrinter is a webapp that allows printing of StackOverflow's questions in a Printer-Friendly way.
Source code is on github.

systempuntoout
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Eezee MVC is An Easy Model, View, Controller Framework for Google App Engine.
Features

  • Has a Controller Class that does routing, handling and rendering templates.
  • Your controllers reside in the controllers folder, views (html Django templates) in views folder, models in models folder.
  • Allows Controller to recieve GET/POST parameters as function arguments.
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    Pubsubhubbub: A simple, open, server-to-server web-hook-based pubsub (publish/subscribe) protocol as an extension to Atom and RSS.

    http://code.google.com/p/pubsubhubbub/

    Navraj Chohan
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