Hello Arturpc,
You're correct, there's no flanger or reverb for the -1701. This DSP has 2K words of data memory, providing 42mS total delay @ 48KHz -- not enough to properly implement those algorithms. The ADAU144x and -145x DSPs have more data memory, but no analog in/out.
The best algorithm info is in the wiki at http://wiki.analog.com/resources/tools-software/sigmastudio/toolbox
but there's not a neat "at-a-glance" table. Generally, the algorithms available for a given SigmaDSP depends both on its processing power as well as how long it's been around. Thus the new ADAU145x, though with an order of magnitude more capability, presently has fewer available algorithms than the -1701. The next release of SigmaStudio will likely fix that.
Best regards,
Bob