RABET Version: 1.3.5 RABET is a cross-platform desktop application for behavioural annotation of animal video recordings. It supports real-time event tagging with configurable keyboard shortcuts, timeline-based review, summary analysis, visualization, and inter-/intra-rater reliability assessment. This release provides self-contained desktop builds for Windows, macOS, and Linux. No separate Python installation or system-wide video runtime is required. Main features - Real-time behavioural event annotation from video recordings- Configurable keyboard-to-behaviour mappings- Timeline display with colour-coded behavioural events- Export of annotation data and summary CSV files- Multi-file analysis of behavioural metrics- Visualization tools for reviewing annotations- Inter-/intra-rater reliability assessment- Project-mode support for organizing related videos and annotation files Download and launch Choose the file matching your operating system: Windows installer:RABET-Windows-1.3.5-Setup.zipDownload and unzip the archive, then run RABET-Setup.exe. Windows portable:RABET-Windows-1.3.5-portable.zipDownload and unzip the archive, then run RABET.exe. This version does not require installation. macOS Apple Silicon:RABET-macOS-arm64-1.3.5.dmgFor Macs with Apple Silicon chips such as M1, M2, M3, or later. macOS Intel:RABET-macOS-x86_64-1.3.5.dmgFor Intel-based Macs. Linux:RABET-Linux-x86_64-1.3.5.AppImageDownload the AppImage, make it executable, and run it. macOS first launch The macOS builds are unsigned and not notarized. After downloading the DMG, open it and drag RABET.app to Applications. On first launch, macOS may report that the app is "damaged" or cannot be verified. This is Gatekeeper quarantine, not a corrupt download. The most reliable fix is to open Terminal and run: xattr -dr com.apple.quarantine /Applications/RABET.app Then open RABET.app normally. This only needs to be done once for each downloaded copy. Linux first launch After downloading the AppImage, make it executable: chmod +x RABET-Linux-x86_64-1.3.5.AppImage./RABET-Linux-x86_64-1.3.5.AppImage Source code and documentation Source code, documentation, and issue tracking are available at:https://github.com/mi2e-K/RABET