I can't think of anything that's not available on "Novell". Novell makes a lot of products, and when you count SUSE, there's virtually nothing that you can't do. Well, no Active Directory, but who wants that anyway.
As for NetWare, there are few services which aren't available if you're using general catagories like "database" and "web server". But, there are few products in each catagory available. I'm thinking along the lines of Peoplesoft/JDEdwards, Oracle Financials, network monitoring systems like Openview and Tivoli. Also email, except GroupWise. Mercury used to support NetWare, and maybe still does, but you needed an external SMTP server since NetWare doesn't have one. Plus, no multi-user capabilities like ssh or Terminal Services.
And, limited support for applications in protected memory, but I'll confess that NW5.1 is the last time that I dealt with that directly. It may be improved in 6.x. A hung or abended app often could not be restarted; the server had to be rebooted. I've wanted a "kill" command for NetWare for years.
Many, many people like NetWare just as it is. I really do hope that Novell doesn't eliminate any of the current capabilities. To expand on LawnBoy's comment, you almost always have to bring another OS into a NetWare shop to handle enterprise applications, while you're rarely required to bring NetWare into a non-NetWare shop. Hence the creep away from NetWare even though it does it's job better than anyone else.