google-play-crawler is simply for searching android applications on GooglePlay, and also downloading them.
Ranked in these QuestionsQuestion Ranking
Pro Desktop APK download
Allows you to download applications with a single click to your desktop. Simulates Android GCM Push-in mechanism to allow downloads from the web.
Pro Well documented
Provides the basic information to set up and use the API on Github's repository.
Pro Well documented set-up
It's well documented towards setting up user login and proxy which are needed for making requests to the API.
Pro Generates ANDROID-ID
Has the ability to generate ANDROID-ID which is needed to request data from the API.
Con Uses Galaxy S3 properties by default.
Can only download apps that are compatible with the Samsung Galaxy S3. Creators encourage users to use different properties as seen [here.](Motivated users can add other device properties from here : http://www.glbenchmark.com/phonedetails.jsp?benchmark=glpro25&D=Samsung+GT-I9300+Galaxy+S+III&testgroup=system)