My colleagues just released ad_man, a new, easy-to-use mountable engine that can help you power a small banner ad system. If you want to support your Rails site with simple banner ads, this may be the piece you need to make it happen. It's just released, so comments and pull requests are welcome!

My colleague just released textilize, a drop-in replacement for the old textilize helpers in Rails 2.x. If you are updating an older app to Rails 3.x, it may be of use. Textilize is different from other textile gems that exist because includes the pure ruby version of RedCloth written by _why. Other gems require the new 4.x version of RedCloth that needs to be compiled. We just have a few small uses for textilize, and needed something that worked without any extra dependencies. Hope you can find it useful too.

We've been looking for ways to re-use code between multiple projects, and have come up with a an Engine setup that is easily separated and easy to override in your project. My friend wrote a nice example and tutorial.

Have you ever needed to solve a linear program in your ruby app? Well, if you have, you know that rglpk (pronounced Wriggle-Pick) allows you to use the power of the GNU Linear Programming Kit (glpk) from within ruby. The latest version fixes some memory leaks that hindered performance.

A friend just released method_proxy, a little gem that allows you to tap into method calls for deep code inspection. Use it for AOP style meta-programming, or to record method calls in order to play them back later in a regression test. Enjoy!

We all love ruby for its free-flowing non-static-typedness, but sometimes it's healthy to do little sanity check. To make sure your duck is a duck. must_be is a powerful library for runtime assertions, allowing you to build assumptions into your code. A great way to find bugs before they find you!

Easy loading notice plugin based on prototype and meant to use with Rails. It could be easily adapted to any situation.