You can download STL for free from
STL from SGI
...and adapt it for your purposes if you find problems.
Yep, SGI STL is one of most robust i have seen (has even hashed associations, hash_map, etc...).
I guess, STL is the way to follow, it allows to write classes being easily used by its sequences and associations, and it's reliable, optimised, code is portable, every1 has access to its sources, the shared development goes faster, etc, etc ...
Maybe the main drawback is, that amiga developers haven't a quality RAD tool for development (as for example Visual Studio .NET or Borland Builder). Btw, what happened to AmIDE after it went open source?
re
Treke