Developer Studio Offline Installer

hi guys,
where can i download Developer Studio offline installer?
my device is MC8705.

As mentioned by the page, the full installer is located same as the firmware download section of the product, e.g for SL808xT:

Anyhow, Developer Studio supports “Smart Modules” category only.
MC8705 belongs to “Essential Modules” thus not supported by Developer Studio.

Please check below links for list of products belongs to Smart and Essential respectively.

Still, there are SDK available for MC8705 on various OS platform, please check with your FAE/distributor for info.