|Informix Application Development - Getting Started|
|IBM Informix Developer's Handbook|
|Embedding IBM Informix|
IDS 11 Developer Edition: Available
IDS 11 Developer Edition is already available for download from:
Choose "Informix Dynamic Server Enterprise Edition Trials" and then choose the right download for your needs.
This version has no time limit. Only a few restrictions like maximum storage, memory and sessions. At the time of writing the file sizes are wrong (expressed in KB and not in MB) and there are possibly a few ports still unavailable.