Thanks to huellif, Copernicus (et al @Maemo.org) and Jennifer Jobart (@Nokia Developer) for their help filling in missing pieces, here are repositories for the removed Symbian development content:
Drive 1:
Carbide.ui 4.3 and all Symbian plug-ins
Carbide C++ 2.7 and 3.2
S60v3.0, S60v3.2, S60v5, N97, S^3 and Belle SDKs
S60v3.0 API plug-ins
S60v3.2, S60v5, S^3 and Belle developer libraries
S^3 and Belle developer libraries Eclipse plug-ins
Qt 1.1.1, 1.1.2 and 1.2.1 SDKs for 32bit
Windows and Linux
Drive 2:
S^3 source code
S^3 PDK 3.0.4a and 4.0a
S^3 PDK documentationUPDATE (13 June): It seems that files over 1GB cannot be shared on free Drive accounts. i will split the Qt SDKs for Windows and the PDKs with 7zip and upload them again ASAP.