I wrote an ExpressionEngine Add-on called Detour Pro that sells for $22 ($17.60 after the site I sell it on takes their cut). I released it back in February of

I wrote an ExpressionEngine Add-on called Detour Pro that sells for $22 ($17.60 after the site I sell it on takes their cut). I released it back in February of 2012 and to date I've made about $15k, this year alone $4k to date.