Query offers a Snippet-interface for xPDO's getCollection method. This allows you to query *any* MODX database collection and format the output, including pagination. Query can be used as a replacement for getResources: it offers more flexibility because it's not constrained to fetching only resources.
You can install Query via the standard MODx package manager.
New in Query 1.3.1
Version 1.3.1 includes the vendor/autoload.php (oops).