What do you think the best and the most popular burning software? I think most people will answer Nero. There are many burning software available but I think you can compare it with Nero to prove its performance. Looking from Amazon you will find that its price is about $50. Maybe you don’t want to waste your money for this software because of any reason but still need burning software.
Looking from Nero website will make us know that latest version is Nero 11 and I am very surprise that they provide Nero 10 free version and they call it Nero BurnLite 10. From the download page it surprises me more that it has ability to burn data, photos, video and music to CD/DV or Blu-ray Disc. 
The installation file is just 32MB and compatible with Windows XP, Vista and 7. Here is the download link.
Update:
Nero has provided Nero 11 free version with some new feature and its size is 198 MB that you can still download from above link. Enjoy it!