Postgresql - PostGIS
Postgresql is opensource product. There are good and bad things on it. Because if you are a programmer and you are working with web, I think postgresql is not good for back end database. Then you can use mysql for that purpose. But your going to working other stuff specially GIS stuff you can use postgresql. To add GIS capability to postgresql you have install postGIS in your machine... http://www.postgis.org/ And also it has well built server side procedural languages. To download postgresql latest version http://www.postgresql.org/ To download postgresql docs http://www.postgresql.org/docs/