The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms, it was developed by the Legion of the Bouncy Castle. The package is organised so that it contains a light-weight API suitable for use in any environment (including the newly released J2ME) with the additional infrastructure to conform the algorithms to the JCE framework. The Bouncy Castle Crypto APIs for Java consist of the following: A lightweight cryptography API. A provider for the Java Cryptography Extension and the Java Cryptography Architecture. A clean room implementation of the JCE 1.2.1. A library for reading and writing encoded ASN.1 objects. Lightweight APIs for TLS (RFC 2246, RFC 4346) and DTLS (RFC 4347). Generators for Version 1 and Version 3 X.509 certificates, Version 2 CRLs, and PKCS12 files. Generators for Version 2 X.509 attribute certificates. Generators/Processors for S/MIME and CMS (PKCS7/RFC 3852). Generators/Processors for OCSP (RFC 2560). Generators/Processors for TSP (RFC 3161 & RFC 5544). Generators/Processors for CMP and CRMF (RFC 4210 & RFC 4211). Generators/Processors for OpenPGP (RFC 4880). Generators/Processors for Extended Access Control (EAC). Generators/Processors for Data Validation and Certification Server (DVCS) - RFC 3029. Generators/Processors for DNS-based Authentication of Named Entities (DANE). Signed jar versions suitable for JDK 1.4-1.8 and the Sun JCE. The lightweight API works with everything from the J2ME to the JDK 1.8 and we now provide certificate generation, PKCS/CMS/CRMF/CMP/EAC/DANE/DVCS/TSP/TLS/DTLS and OpenPGP support across the full range of JDKs.

A small and very fast json parser/generator for Java.

Build Realtime Apps. A powerful API to store and sync data in realtime.

The SafetyNet API provides access to Google services that help you assess the health and safety of an Android device.

View "injection" library for Android which uses annotation processing to generate boilerplate code for you.

Add fast, secure checkout for users buying physical goods and services from your app. Transactions are monitored for fraud 24/7. Keep your existing payments infrastructure and integrate Google Wallet quickly, easily and free of charge.

Intercom is a fundamentally new way for internet businesses to communicate with customers, personally, at scale. It's a customer communication platform with a suite of integrated products for every team—including sales, marketing, product, and support. Our products enable targeted communication with customers on websites, in web and mobile apps, by Facebook Messenger, and by email.

Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. Google uses Protocol Buffers for almost all of its internal RPC protocols and file formats.

EventBus is an open-source library for Android and Java using the publisher/subscriber pattern for loose coupling. EventBus enables central communication to decoupled classes with just a few lines of code – simplifying the code, removing dependencies, and speeding up app development.

HTTP is the way modern applications network. It’s how we exchange data & media. Doing HTTP efficiently makes your stuff load faster and saves bandwidth. OkHttp is an HTTP client that’s efficient by default: HTTP/2 support allows all requests to the same host to share a socket. Connection pooling reduces request latency (if HTTP/2 isn’t available). Transparent GZIP shrinks download sizes. Response caching avoids the network completely for repeat requests. OkHttp perseveres when the network is troublesome: it will silently recover from common connection problems. If your service has multiple IP addresses OkHttp will attempt alternate addresses if the first connect fails. This is necessary for IPv4+IPv6 and for services hosted in redundant data centers. OkHttp supports modern TLS features (TLS 1.3, ALPN, certificate pinning). It can be configured to fall back for broad connectivity. Using OkHttp is easy. Its request/response API is designed with fluent builders and immutability. It supports both synchronous blocking calls and async calls with callbacks.