[Doc] Update README.md (#46)

Author: WYK96

README.md

@@ -147,3 +147,5 @@ If you find this project useful in your research, please consider cite:
 - [XRMoGen](https://github.com/openxrlab/xrmogen): OpenXRLab Human Motion Generation Toolbox and Benchmark.
 - [XRNeRF](https://github.com/openxrlab/xrnerf): OpenXRLab Neural Radiance Field (NeRF) Toolbox and Benchmark.
 - [XRFeitoria](https://github.com/openxrlab/xrfeitoria): OpenXRLab Synthetic Data Rendering Toolbox.
+- [XRViewer](https://github.com/openxrlab/xrviewer): OpenXRLab Data Visualization Toolbox.
+- [XRTailor](https://github.com/openxrlab/xrtailor): OpenXRLab GPU Cloth Simulator.