Ushahidi is a free online platform that can be used for crowdsourced mapping. To download Ushahidi a server and programming knowledge are needed. Crowdmap Classic is the hosted version of the Ushahidi platform and is much easier to use for those without programming knowledge.
For those who choose to download Ushahidi, there are a variety of plugins and themes that can be integrated with the platform. Reports can be submitted through SMS, email, or a form. SMS reporting relies on FrontlineSMS or Clickatell. The administrator can also select to turn tweets with specific hashtags into reports. Reports can be uploaded and downloaded by the administrator in CSV or XML format. Ushahidi uses Open Layers, however KML and WMS layers can also be added to the map if desired.