SQL*Plus is still available (DOS version) for 11g. SQL*Developer is part of installation of 11g and is a great alternative to SQL*Plus for replacement of the Windows SQL*Plus.
See Where is Windows SqlPlus in 11g? for more details.
SQl Developer and SQl*plus are not web based products.
Server is in remote location and users can only access it via HTTP (internet) - no direct connection using port 1521.
This is why I plan to have apex available for them.
the i*SQLplus was all web based.