PgAccess is, as name implies, a program for accessing PostgreSQL databases. It's a visual database management program that can show the contents of the database and lets you change it; you don't need to know SQL to use it¹. It also has support for report generation, forms, and scripting.

It was written by Constantin Teodorescu in Tcl/Tk, and runs on *NIX and Windows.

Homepage, as of writing:

¹ I know, these are the Famous Last Words in every occasion...