Hi Larry,
Do you just mean journal articles? The obvious ones are JSTOR and LION, I prefer LION as I find JSTOR hard to search. It will depend on which journals your university is subscribed to as to which articles within those sites you can get access to, but both will bring up search results from across the board so you can then request articles at the library if needs be (Handily, you can also get these delivered to your house). You can also sign up to ZETOC which will alert you as to new publications in your subject area. I'm not really sure about others...I have a few I use which are specific to early modern/medieval literature which is what I study. Hopefully somebody will come along to help you a bit more.