Often it's required to wrap the value of a MODX tag with some markup, but only if the value is not empty. This single line of PHP will do the trick.
Teleport is a command line php tool that can help migrate a MODX website in under 15 minutes.
Really simple slideshow management in MODX CMS.
Change integers to text with the idxtoclass Output Modifier. Used for html class names, among other things.
Integration of the Change.org API into MODX CMS.
A suite of tools to help manage CSS using the MODX CMS.
A MODX Snippet gets formatted user profile information. Includes an output modifier that generates the gravatarUrl from an email address.
A peek behind the curtain of responsive video embedding, using Zurb's Foundation CSS Framework.
Dynamic content blocks tutorial for MODX-powered sites - can also be used for landing pages and single-page sites.
A series of short tutorials that help you turn your own, custom HTML and CSS into a dynamic, CMS-powered website in less than an hour.