1. MapGuide open source官方网站: https://mapguide.osgeo.org, 提供源代码，安装程序，地理数据，开发文档(包括c#，java, php示例)和丰富的教程。
MapGuide Open Source is a web-based platform that enables users to quickly develop and deploy web mapping applications and geospatial web services. MapGuide features an interactive viewer that includes support for feature selection, property inspection, map tips, and operations such as buffer, select within, and measure. MapGuide includes an XML database for managing content, and supports most popular geospatial file formats, databases, and standards. MapGuide can be deployed on Linux or Windows, supports Apache and IIS web servers, and offers extensive PHP, .NET, Java, and JavaScript APIs for application development. MapGuide Open Source is licensed under the LGPL
2. open soruce geospatial organizaiton开源地理组织官方网站: https://www.osgeo.com，提供世界上最强的开源地理信息系统平台和技术。现在的开源项目OSGeo Projects：
Web Mapping
Mapbender
MapBuilder
MapGuide Open Source
MapServer
Desktop Applications
GRASS
OSSIM
Geospatial Libraries
GDAL/OGR
GeoTools
Other Projects
Public Geospatial Data
Education and Curriculum
The Open Source Geospatial Foundation has been created to support and build the highest-quality open source geospatial software. The foundation's goal is to encourage the use and collaborative development of community-led projects. This website serves as a portal for users and developers to share their ideas and contribute to project development. As the Open Source Geospatial Foundation grows and changes, so will this website.
3. open source geospatial organizaiton中国: https://china.osgeo.com
与商用GIS/RS软件相比，开源空间信息软件(如GRASS、GDAL、MapGuide和MapServer)已具有相当竞争力。开源空间信息基金会(Open Source Geospatial Foundation, 简称OSGeo)是一个全球性非营利性组织,目标是支持全球性的合作,建立和推广高品质的空间信息开源软件。
OSGeo中国中心是由国家遥感中心发起、Autodesk中国有限公司协助，经OSGeo正式授权的非营利性组织。中心依托在国家遥感中心，与OSGeo理事会紧密合作。OSGeo中国中心的使命是支持开源地理信息软件和遥感软件的开发以及推动其更广泛的应用，尤其是帮助中国地区的用户和开发者更好地使用OSGeo基金会提供的源代码、产品及服务。
4. studio下载: 在autodesk上有preview版下载。studio支持open source和enterprise开发。
5. open soruce的开发模式,开发文档和enterprise几乎完全一样。所以你不用去费心寻求enterprise版本。