I've been using and recommending ticTOCs, but I think I've found an equally good and quite different Tables of Contents aggregator, again brought to us by the UK. Another recommendation from INFOdocket, written up by Gary Price in Search Engine Land, JournalTOCs covers "17,000 journals published by more than 900 publishers and organizations."
It's very easy to get an RSS feed to the publications you want (an important different to me from ticTOCs). However, the subject classification is even less granular, which makes it much harder to narrow down to a particular area of interest.

