Best freeware for creating DVDs on PC

InfraRecorder: infrarecorder.org/

Features
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 being 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).

DVD Flick: www.dvdflick.net/

About DVD Flick
DVD Flick aims to be a simple but at the same time powerful DVD Authoring tool. It can take a number of video files stored on your computer and turn them into a DVD that will play back on your DVD player, Media Center or Home Cinema Set. You can add additional custom audio tracks, subtitles as well as a menu for easier navigation.
Features
Windows Forest Awards 2007 Copper prize (4th place)

FindMySoft Viewo Review
Burn near any video file to DVD
Support for over 45 file formats
Support for over 60 video codecs
Support for over 40 audio codecs
Easily add a menu
Add your own subtitles
Easy to use interface
Burn your project to disc after encoding
Completely free without any adware, spyware or limitations

IMGBURN: www.imgburn.com/

ImgBurn is a lightweight CD / DVD / HD DVD / Blu-ray burning application that everyone should have in their toolkit!

It has several 'Modes', each one for performing a different task:

Read - Read a disc to an image file
Build - Create an image file from files on your computer or network - or you can write the files directly to a disc
Write - Write an image file to a disc
Verify - Check a disc is 100% readable. Optionally, you can also have ImgBurn compare it against a given image file to ensure the actual data is correct
Discovery - Put your drive / media to the test! Used in combination with DVDInfoPro, you can check the quality of the burns your drive is producing