Homeworks assignments, and solutions when they are written, can be found here; problems in TeX, Postscript, and PDF format, and solutions in PDF format.

There are of course a lot of textbooks on topology out there, but the web page I knew of, that listed them, doesn't exist anymore. On the other hand, thanks largely to Mel Thornton, I now own most of them, so you can stop by my office and look them over, if you want....

The Topology Atlas is a huge database of (mostly research-level) information on topology. It includes a page of lecture notes in topology, for example.

There is a fairly wide ranging discussion of General Topology (i.e., point-set topology), which is part of a larger group of pages on the various divisions of mathematics.

More generally, there is the rather entertaining Interactive Mathematics Miscellany page. My favorite little tidbit so far has been "[By the extreme value theorem,] for any object there is a distance at which it looks its best." (It took me a little while to figure out why that was actually true.)