You can download the Bot Libre project and source code from GitHub, or the zip from SourceForge.
Bot Libre's development uses Eclipse and ant. Each component contains an Eclipse project that defines the component and dependencies. Each component also has a build.xml ant build file that can be used to compile the source code into a jar. ant is a command line driven build tool that can be downloaded free from the Internet (just google ant).
The Android apps and SDK also are using Eclipse. You can download Eclipse and the Eclipse Android dev environment from Eclipse.org.
The iOS apps and SDK are developed in objective C with Apple XCode. The GUI's are built in code, not through XCode's GUI tools (which is actually much easier and causes fewer headaches).