Repository of php Scripts for Templates

[pwired]

it would be great to have some sort of repository of php scripts on the PW website for formatting template data, i.e. the php snippets for outputting different kinds of menus, breadcrumbs, bloglists, etc.

Well I think the IDE you are using is a good place to have the scripts you mentioned available, right there where you would need them while working on your website or project. Most good IDE's already come with included language definition files for php, html, html5, js, sql, etc. etc. You can customize and add anything you want right there. In the IDE snippets sidebar you can add your own snippets and other re-usable code and parts of a website you did in the past. In there you can even add your own comments to them for not forgetting important how and what

See this post also about a superb IDE with inbuild code library repository

http://processwire.com/talk/topic/3518-what-ide-do-you-utilize/page-3#entry43206