RAPTOR is a flowchart-based programming environment, designed specifically to help students visualize their algorithms and avoid syntactic baggage. RAPTOR programs are created visually and executed visually by tracing the execution through the flowchart. Required syntax is kept to a minimum. Students prefer using flowcharts to express their algorithms, and are more successful creating algorithms using RAPTOR than using a traditional language or writing flowcharts without RAPTOR.
Are you interested in running RAPTOR on Chromebooks, iPads, or just in a browser? Check out the pre-release here!. This is NOT fully tested. Send feedback via
A Multiplatform version of RAPTOR is now available for Windows, Mac and Linux built on top of [Avalonia]! See the downloads section below. Uses fonts from Noto Sans CJK for internationalization. Key differences:
Figure 1 RAPTOR for Windows
Figure 2 RAPTOR Avalonia
Papers on RAPTOR application:
RAPTOR referenced in following books or publications:
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Illegal movie portals do not use premium ad networks. Instead, they rely on aggressive . Clicking anywhere on a proxy site can trigger automatic scripts that install adware, ransomware, or spyware onto your device. 2. Phishing and Fake Clones
Accessing copyrighted material via sites like 9xmovie.win or its proxies violates international copyright laws.
The Court granted a summary judgment restraining the infringing websites and directing ISPs and governmental authorities to block access to them. 9xmovie.win proxy
Navigating the 9xmovie.win Proxy Network: A Guide to Mirrors and Safety
Navigating the 9xmovie.win Proxy Network: Safety, Speed, and Legal Alternatives Illegal movie portals do not use premium ad networks
While the allure of free content is strong, the risks associated with using 9xmovie.win proxy sites are substantial and should not be ignored.
Standard antivirus software may not stop malicious browser scripts. Install robust browser extensions like uBlock Origin to actively block pop-ups, malicious redirects, and invisible tracking scripts before they load on your device. Rely on Premium Antivirus Software Navigating the 9xmovie
If you absolutely must access 9xmovie content, use a , enable uBlock Origin , and never download any “player” or “update” files.
: Redirections from these sites can lead to unintended malware installations, including "fileless malware" that is difficult for standard antivirus software to detect until damage is done.
The platform is particularly known for its collection of South Indian, Bollywood, and Hollywood content, often available in various file sizes and qualities shortly after theatrical release. Its key appeal has always been the promise of free access to a wide range of entertainment without the need for registration.
Tubi is arguably the leader in free legal streaming. As of mid-2025, Tubi offers more than 300,000 movies and TV episodes completely free. The service is ad-supported, but the ad breaks are not excessive and include countdown timers to make interruptions less jarring. Tubi also provides a sizable number of live FAST channels and offers independent filmmaker content that cannot be found elsewhere.
Do you want more older versions? Check out older versions of RAPTOR here
Did you know RAPTOR has modes? By default, you start in Novice mode. Novice mode has a single global namespace for variables. Intermediate mode allows you to create procedures that have their own scope (introducing the notion of parameter passing and supports recursion). Object-Oriented mode is new (in the Summer 2009 version)
RAPTOR is freely distributed as a service to the CS education community. RAPTOR was originally developed by and for the US Air Force Academy, but its use has spread and RAPTOR is now used for CS education in over 30 countries on at least 4 continents. Martin Carlisle is the primary maintainer, and is a professor at Texas A&M University.
Below handouts are by Elizabeth Drake, edited from Appendix D of her book, Prelude to Programming: Concepts and Design, 5th Edition, by Elizabeth Drake and Stewart Venit, Addison-Wesley, 2011. Linked here with author's permission.
Comments, suggestions, and bug reports are welcome. If you have a comment, suggestion or bug report, send an email to .
David Cox has put together a user forum at http://raptorflowchart.freeforums.org. This provides a place for users to exchange ideas, how tos, etc. Note however, that feedback for the author should be sent by email rather than posting on this forum.
Randy Bower has some YouTube tutorials at http://www.youtube.com/user/RandallBower. You can also search YouTube for "RAPTOR flowchart".
The UML designer is based on NClass, an open-source UML Class Designer. NClass is licensed under the GNU General Public License. The rest of RAPTOR, by US Air Force policy, is public domain. Source is found here. RAPTOR is written in a combination of A# and C#. Unfortunately, I don't have the time to provide support on compilation issues