IronFox
IronFox is a free and open source, privacy and security-oriented web browser for Android, based on Mozilla Firefox.
AndroidIDE (archived)
AndroidIDE is an IDE to develop Gradle-based Android applications on Android devices, with support for advanced language features (code completion, quick actions, real-time code analysis, etc.).
Scribe
[Prototype] Scribe is a next-generation Android IDE that applies microkernel design ideas. It is built around a plugin system designed from scratch, where extensions are isolated by default and only gain deeper access through explicit user control. This work is still in early stages.