Real men use vi.

Gaylord.

Some generic tools work with Informix.
Besides those, you can consider for example:

. ServerStudio ( http://www.serverstudio.com )
. IBM Data Studio ( http://www-306.ibm.com/software/data/studio/ )

But you should specify exactly what you need to do.
If you're trying to look for Oracle equivalents you may hit a common error:
forgetting that databases are really different...
You probably don't need some of the "features" you find in some of the usual
tools for Oracle.

Regards.

If you are on Windows, Winsql Lite is a good choice.
It is free and saves you tons of time compared to dbaccess.
You can have the results in a grid if you prefer, or generate html.
I just use the text output myself.
You will need to have the Informix odbc driver on the box you are running from.
It will install a better odbc driver but that one times out in 30 days.
They always try to get you go upgrade to the "Professional" version which draws ERP charts, etc.

The error messages you get are not as specific as what you get from dbaccess,
but if you know what you are doing, that is no problem.
However, if you are writing a new stored proc, dbaccess is much more helpful.
Winsql knows nothing about SPL and will just barf up some generic, unhelpful message.
It also will not do "unload to x select ..." or "load from x insert into ..." .
You have to use GO between statements unless you are in a transaction.
That is a bit annoying.

You can also select part of the screen and execute only that part, which is handy.
The editor is dicey in my opinion and has unusual hot-keys.
I wish it were more like the Visual Studio editor or even notepad. Or even better - vi .
There are probably better products out there if you want to pay for them.