ECE 576 Advanced Microcontroller Systems on a Programmable Chip - Course on system-on-chip and embedded control; much Nios information; taught by Bruce Land, staff member in Neurobiology and Behavior and Electrical and Computer Engineering, Cornell University. - http://instruct1.cit.cornell.edu/courses/ece576/
ixo.de: Kolja Waschk - Projects to port (add support for) Altera NIOS II processor to 2 realtime operating systems: FreeRTOS, RTEMS; descriptions, documents, downloads. - http://www.ixo.de/
Nios Community Wiki - Dedicated to making the most of Nios II embedded processor development by giving a means to collaborate on user guides, design tips, and other frequently asked questions. WikiHome, JotSpot Wiki. - http://nioswiki.jot.com/WikiHome
Nios Community Forum - News, forum, marketplace, projects, support, communication, and idea sharing, for embedded processor development. - http://www.niosforum.com/
Nios Embedded Processor - Product page on general-purpose RISC CPU implemented as soft core in FPGAs; had 16-bit and 32-bit CPUs; documents, data, diagrams. Altera Corp. - http://www.altera.com/products/ip/processors/nios/nio-index.html
Nios II - Growing article, with links to many related topics. Wikipedia. - http://en.wikipedia.org/wiki/Nios_II