| qxw | QLC+ Workspace |
| rav | Rave Reports Project |
| rbp | RealBasic Project |
| rbvcp | Real Studio Subversion Project |
| rcdx | STAAD Advanced Concrete Design Project |
| rcl | Roxio Easy CD and DVD Creator 6 Project |
| rcx | RedCine-X Project |
| rcy | ReCycle Document |
| rdw | Real-DRAW Project |
| rf0 | SmartWare Runtime Project |
| rf1 | SmartWare Spreadsheet Runtime Project |
| rf2 | SmartWare Word Processor Runtime Project |
| rf3 | SmartWare Runtime Project |
| rf4 | SmartWare Communications Runtime Project |
| rgp | Rosegarden Project Package |
| rhv | Rhvac Project |
| rnb | Okapi Rainbow Project |
| rnq | Renque Project |
| rnqp | Renque Presentation |
| ro | ROwin Project |
| rppkg | Axure RP Project Package |
| rpprj | Axure RP Shared Project |
| rprj | Ride7 Project |
| rproj | R Project |
| rptproj | Microsoft SQL Server Report Project |
| rpw | RPWiz Project |
| rpy | IBM Rational Rhapsody Project |
| rpyx | IBM Rational Rhapsody 8.3 Project |
| rqs | RequisitePro Project Information |
| rqtf | NI Requirements Gateway Project |
| rsk | RiskMan Risk Project |
| rsn | Reason Project |
| rsv | RSView32 Project |
| rva | Lattice Reveal Analyzer Project |
| rvc | MicroImages TNT Project |
