I was looking for a lightweight alternative to Nero that supports importing of sessions (other than Cheetah which is a bit TOO light). I found
InfraRecorder. Here's some features as described on the site:
* Create custom data, audio and mixed-mode projects and record them to physical discs as well as disc images.
* Supports recording to dual-layer DVDs.
* Blank (erase) rewritable discs using four different methods.
* Record disc images (ISO and BIN/CUE).
* Fixate discs (write lead-out information to prevent further data from beeing added to the disc).
* Scan the SCSI/IDE bus for devices and collect information about their capabilities.
* Create disc copies, on the fly and using a temporary disc image.
* Import session data from multi-session discs and add more sessions to them.
* Display disc information.
* Save audio and data tracks to files (.wav, .wma, .ogg, .mp3 and .iso).
I haven't fully tested it out yet but it does look decent.
I should mention that it requires no install, just extract and it's ready to go.