You could have downloaded AVIX for PIC24-dsPIC 4.6.0 from our software library for free. Our antivirus check shows that this download is safe. This free tool was originally produced by AVIX-RT. The most popular version among the program users is 4.6. AVIX for PIC24-dsPIC lies within Development Tools, more precisely Debugging Tools.
From the developer:
AVIX is a new preemptive Operating System, offering new features, in combination, not found in any other competing product. AVIX is based on a different architecture which is one of the most advanced architectures. This feature allows extremely high interrupt rates no competing product is able to reach. AVIX is available for a number of different micro controller families.
You may want to check out more software, such as Flowcode for PIC24dsPIC, which might be similar to AVIX for PIC24-dsPIC.