I don't know much about the 760/860 Zauri. Are you running pdaxrom beta 1?
If so, here is the feed for pdaxrom beta1 for 7x0/860. This should cover your needs for your 760
http://distro.ibiblio.org/pub/linux/distri...s-7x0-860/feed/Abiword is there. I don't know about Abi sheet. Firefox is available, but it is very slow to load.
Opera is only available for Sharp/Cacko ROMs. Opera will not work in pdaxrom. Someone got it working in an older version of Open Zaurus (Opie), a long time ago
You are better off when using a feed to use the package manager and fetch your packages with your Zaurus online.
This will make sure any dependencies are also downloaded when you fetch a package.
Also, just do some browsing in the pdaxrom subforum, and search that forum for things you're interested in.
Also check out the pinned thread called" "New Packages announcements"