If you need to publish your maps online, there is no need for Geoserver, Map Server or ArcGIS Server, which are all hard to install and maintain.
TileServer, an open-source alternative from Klokan Technologies, is really easy to use with any standard hosting that supports PHP. Just upload the maps you created with MapTiler, and you immediately get dozens of popular web viewers with interactivity, including Google Maps API, Leaflet, Open Layers, WebGLEarth and Mapbox JS. The source codes are ready to copy and paste into your website.
All the maps that you upload can also be directly opened in GIS software such as Quantum GIS, ArcGIS or uDig. The hosting viewer comes with step-by-step tutorials on how to do that.