looking for Students information system

Hi Guys,

Currently we are using .topschoolinc.com as a Student information system to enable students to check their grades, enable teachers to change grade, view attendance, add new students....etc.  this cost is $110000 annual free.  which is very expensive that is why we have to change to something else

I browsed through internet and managed to find open source that does same thing,  they are (opensis, and Fedena).  if you have had any experience with these tools your tell me about it.  How good they are.   and if you know other once please advice

thanks