If you use RAPID, consider citing it!
If you wish to cite RAPID in your publications, please use the original paper:

David, Cédric H., David R. Maidment, Guo-Yue Niu, Zong- Liang Yang, Florence Habets and Victor Eijkhout (2011), River network routing on the NHDPlus dataset, Journal of Hydrometeorology, 12(5), 913-934. DOI: 10.1175/2011JHM1345.1

Additionally, please consider citing the reference for the software:

David, Cédric H. (2019), RAPID, Zenodo, DOI: 10.5281/zenodo.593867 10.5281/zenodo.593867

Note that it is good practice to specify the actual version you used:

David, Cédric H. (2010), RAPID v1.0.0, Zenodo, DOI: 10.5281/zenodo.27239 10.5281/zenodo.27239
for source code downloaded between 2010-09-10 and 2011-02-09.
David, Cédric H. (2011), RAPID v1.1.0, Zenodo, DOI: 10.5281/zenodo.27241 10.5281/zenodo.27241
for source code downloaded between 2011-02-10 and 2011-07-15.
David, Cédric H. (2011), RAPID v1.2.0, Zenodo, DOI: 10.5281/zenodo.27242 10.5281/zenodo.27242
for source code downloaded between 2011-07-16 and 2013-01-13.
David, Cédric H. (2013), RAPID v1.3.0, Zenodo, DOI: 10.5281/zenodo.27243 10.5281/zenodo.27243
for source code downloaded between 2013-01-14 and 2013-11-13.
David, Cédric H. (2013), RAPID v1.4.0, Zenodo, DOI: 10.5281/zenodo.24756 10.5281/zenodo.24756
for source code downloaded between 2013-11-14 and 2015-03-08.
David, Cédric H. (2013), RAPID v1.5.0, Zenodo, DOI: 10.5281/zenodo.2560538 10.5281/zenodo.2560538
for source code downloaded between 2015-03-09 and 2015-09-05.
David, Cédric H. (2013), RAPID v1.6.0, Zenodo, DOI: 10.5281/zenodo.2560556 10.5281/zenodo.2560556
for source code downloaded starting 2015-09-06.

RAPID is now on GitHub at
The latest official release is available here.
You may also Fork RAPID on GitHub.
And you can Star RAPID on GitHub.
The RAPID repository on GitHub includes all versions of the code that were published online since September 2010 with tracked changes.

Sample RAPID input/output data
Download all input and output data from David et al. (2011, JHM). These include NHDPlus river network connectivity, lateral inflow from the land surface (computed with Noah-MP) and gage measurements (from USGS NWIS) for a 4-year run (between 2004-01-01 and 2007-12- 30) in the San Antonio and Guadalupe River Basins in Texas. 10.5281/zenodo.16565
Download all input and output data from David et al. (2011, HP). These include SIM-France river network connectivity, inflow from the land surface (computed with ISBA), bilateral inflow from groundwater (computed with MODCOU) for a 10-year run (between 1995- 08-01 and 2005-07-31) in the domain of SIM-France.

Some RAPID scripts
Download a script to get NLDAS2 land model data and convert them to RAPID water inputs, and download other corresponding RAPID input data.
Download an NCL script to make flow maps from a shapefile and corresponding RAPID outputs and saved as an image. The images created with this script are used to make the animations in this website.
Download a Fortran script to process USGS NWIS observations obtained with CUAHSI HydroDesktop for RAPID.
Download a Python script to download USGS NWIS observations from the CUAHSI WaterOneFlow webservices.
Download Fortran programs to process some RAPID inputs and outputs.

Community contributions
Download a shell script to install the prerequisites of RAPID.
Download a Python wrapper for RAPID.
Download the ESRI ArcGIS toolbox for RAPID.