obGmaps module allows to embed Google Maps to anywhere in your Joomla site. Adding Google Maps is very simple, just add the latitude and longitude which location you want to show an a map. This Google Maps module is also possible to define the size of the map, zoom level.
Twitter Tweets is used to display twitter messages. It will take twitter status via API and display directly on site without using embed code. Beside, these tweets will be saved to the cache so the process of load tweets will be very easy. Twitter Tweets comes with powerful admin panel and easy to use.