Ada IDE's For Linux?

tsetem asks: "My company is a DoD contractor. As such, most of the code we have written in the past, and are currently writing/porting is in Ada. In the past, we have used IDE's ranging from Rational Apex (Not available for Linux yet) to Vi. What I'm wondering is is there a nice & powerful IDE for Linux? So I turn to the Slashdot Community to see who has worked with Ada, and what they feel the best development environment is under Linux. Ada may not be the most popular language, but I'm sure someone has written tools to make working with it that much easier."

"I did run across SNIFF+ and Source-Navigator. SNIFF+ is about $1500, but they appear to be ready to drop Ada support once v4.0 comes out later this month. CAS out of Germany appears to have an Ada parser & object browser to add Ada functionality to Source-Navigator, but I can't get a hold of them to see how much the parser would cost, or even a demo version."