I believe he's talking about AdaGIDE, which is really quite nice. It does highlighting of your code, when compiling, errors appear in the bottom window and you click on one and the line the error is on will be jump to in the top window. Another nifty feature of this I found was the auto-reformat, where you can specify how you want your code to be formatted, which is something I would like. A lot of reformatters I've found make it very difficult to specify how you want things formatted, for example, I write my if statements like:

if (boolean) {
   statement;
   statement;
} else {
   statement;
   statement;
}
[download]

but I find alot of reformatters like to:

if (boolean)
{
   statement;
   statement;
}
else
{
   statement;
   statement;
}
[download]

If I anyone can show a good, customizable reformatter (that is easily customizable), I'd appreciate it.