This may get you started:
- MatDL Pathway
- NIST SRD ( I would write them)
- Java Applet: Phase Transition Temperatures (untested)
It is a very good question, which I came across as well. You could just google-image search phase diagram + ELEMENT to copy and past the most appealing charts into a table in your editor of choice.
If the intend is personal use, this might be the fastest route.
wolfram alpha should allow you to look up the state of the element at a given pressure as follows:
sodium phase at 0 bar
Helium itself is a particularly interesting subject.