* 3rd party applications that are not included to Sugar Platform e.g. Qt
+
* applications that were not included to all deployed Sugar Platforms e.g. gst-espeak came only from 0.84 and Services will let gst-espeak based activities work even in 0.82 environment
+
* dependencies that are specific to particular activity e.g. some python activity have C libraries, using Services, activity developer should not bundle all binaries that sugar supports but provide binaries that he can build and let Services build C libraries from sources on user side in the rest of cases