Melita Maschmann's Fazit (Engl. trans. early 1960s w/ intro by Russell of Liverpool; new German ed. in 1980s, surely with a new intro or postscript, which I haven't seen), is the autobiographical story of a high level BDM leader who is indeed repentent. It's very good, if somewhat hard to locate.
Johannes Steinhoff et al (eds.), Voices from the Third Reich (1989, 1994) contains some interesting material from complicit persons as well.
Rolf Schörken, Luftwaffenhelfer im Dritten Reich (Stuttgart 1984) tells the story (w/ good Literaturbericht) of the not-quite-18-year olds in 1944-45, and how they reflect back on being "taken" by nazism.
There is loads of apologetic stuff published by right-wing houses in Germany; if your on-line catalog does key-word searches, try looking up Dru"ffel in Leoni am Starnberger See (they have, among other things, the memoirs of Rudolf Hess (not to be confused w/ Auschwitz commandant Höß);
Try also Verlag K.W. Schütz in "Preussisch Oldendorf", which has among other things, the name of the Gauleiter of what is now Niedersachsen, "An ferne Ufer" (or similar; the guy's name escapes me). Note: this is very unrepentant stuff.
On Jewish complicity, there is of course Peter Wyden's Stella. Last year Die Zeit did a full page feature from the diary of a Jewish Ghetto policeman who survived the war; he was agonizing about having sent his family to their deaths. it was probably taken from a book. (I won't comment on the German paper's need to publish something about a Jewish perpetrator.)
Back to the original question - there are also some things that are neiter repentant nor unabashedly nazi: Hjalmar Schacht did some autobiographical pieces in the 50s, and Ernst von Salomon's "Fragebogen" tells the story of a Freicorpsler who was, let me say fascist, but not Nazi.
Harold Marcuse, UCSB