Simon Willison’s Weblog

Running Rhino and Helma NG on Google App Engine. Helma NG is a JavaScript web app framework, which now works on App Engine out of the box.

Posted 12th April 2009 at 12:52 pm

Recent articles

Claude can write complete Datasette plugins now - 8th October 2025
Vibe engineering - 7th October 2025
OpenAI DevDay 2025 live blog - 6th October 2025

appengine 33 google 386 helma 1 helmang 1 javascript 722 rhino 2

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe