Bruce Eckel's Thinking in C++ Volume 2 is a free e-book with a whole chapter on STL algorithms (ch6) - its mainly in tutorial/learn-by-example format (rather than reference format), but its worth a look
http://mindview.net/Books/TICPP/ThinkingInCPP2e.htmlMSDN has this page with a whole lot of STL examples (it seems a bit jumbled, although I think its all standard C++, though there's always a danger that MS have slipped in some non-standard code)
http://msdn2.microsoft.com/en-us/library/f1dtts6s.aspxHere's another reference (no examples) from Dinkumware, who are known for their STL implementations
http://www.dinkumware.com/manuals/default....e=algorith.htmland CPPreference (again, not a huge number of examples)
http://www.cppreference.com/cppalgorithm/as for books,
The C++ Standard Library by Nicolai M Jossutis is a fairly complete reference to the STL, with over 100 pages dedicated to the <algorithm> header, with good examples for each (And a whole lot more on functors, containers, iterators, etc) - that book is a bible to me when it comes to looking up individual parts of the STL.