OpenDataPhilly includes both municipal and non-municipal data and enables users to search for and locate data sets based on keyword and category searches. For each data set, application, or API, we’ve included accompanying information about the origins, update frequency, and other specifics of the data. The record for each data source also includes links for downloading the data or accessing the application or API.
Pennsylvania Spatial Data Access (PASDA) is the official public access geospatial information clearinghouse for the Commonwealth of Pennsylvania. The site includes several online mapping tools and a search engine for finding datasets to download. The Tutorials link also looks useful.