A Userscript Manager in Userscript
Oven can be installed Here. Oven will try to update itself. Self-updating works even if the browser has no support for updating userscripts.
For now, Oven only works on Google+. Oven will check the current URL to ensure that it begins with "https://plus.google.com/".
Oven runs only on Google+, but it matches all URLs in order to workaround the absence of cross-domain XHRs in Google Chrome.
Oven stores all the snippets along with the updated version of itself in localStorage. They are subject to the storage limit (~5MB in major browsers).
Oven and the host website share the storage quota.
Currently, Oven has no error handling measures regarding storage limits.
Snippets can be hosted anywhere including Github. However, this project only focuses on the manager itself and therefore contains only the builtin snippets.
Some of my snippets for Google+ can be found here.