Retrofit is a type-safe HTTP client for Android and Java
- Retrofit (link)
- GitHub repo, with samples (link)
- Synchronous and Asynchronous requests (link)
- Retrofit with RxJava (link)
- Retrofit async demo (link)
- Retrofit 2.0 update (link)
is a library that can be used to make working with asynchronous code easier.
- Awaitility on GitHub (link)