CathLibCpp is hosted by Alexander Thoukydides
As his site no longer responds, I make available the documents that are his property.
The Alexander ToolBox C++ library 32 bits version (buit with DDE26/OSLIB32/CathLibCpp32
Miles Sabin adapted SGI's STL to work with CFront (not simple). it works very well, even if it dates from the last century.
The examples provided with 26-bit source fully recompiled with DDE and functional.
For the anecdote, the announcement for the 32-bit version of CathLibCpp made jointly with Alexander, it was on his site. I wanted to rebuild PsiFs to use with my ARMX6, it works. A large part of the program is made in C++ with CathLibCpp
To come the library usable with the DDE.