Free universal database tool and SQL client

Telegram for Android source

QuestDB is a high performance, open-source, time-series database

No clever tagline needed.

Android Unit Testing Framework

iOS and macOS Decompiler

Security engine for Java (authentication, authorization, multi frameworks): OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...

A networking framework that evolves with your application

Java library for working with VK API

Automated tests of homework exercises