Disclaimer: I made this mostly for my own convenience. Use it at your own risk.
All source code are downloaded from today's github brainwallet.org repository and I only added an icon, a manifest, and moved the inline "onclick" and "onkeypress" handlers out of HTML and into brainwallet.js to avoid a Chrome content security policy error. Feel free to inspect the app for any discrepencies.
Motivation: I like brainwallet.org a lot, but sometimes I want to access it on an offline computer, and I find it tedious to have to download the ZIP file from github and extract them to a local dir.
Here's the link to the Chrome app store:
https://chrome.google.com/webstore/detail/offline-brain-wallet/chajgmmpmfmbneeemmahlgogajbbmdag