CDBurnerXp is a nice free program and for most of the sub programs of the two major players (Roxio and Nero) well you can find freeware programs to take care of those also.
If you are looking for a pay program then you might take a look at VSO CopytoDVD; frequent updates and works great with Win7.
Once you give ImgBurn a try and learn its features it could just be the best option and is my favorite burning software.
You can also use it to find converters, muxers, authoring tools etc..
I use Imgburn to burn and several freewares for conversions depending on exactly what input and output I want. Just about any free converter that uses HCenc and doesn't crash should give you good output. Try AVStoDVD, FAVC, well, use the list tool in the link.
My Computer
Computer Manufacturer/Model Number
HP Media Center
OS
Windows 7 32 bit
CPU
AMD 5200+ dual core
Memory
2 GB
Graphics Card(s)
NVidia GeForce 6150SE 128 MB
Monitor(s) Displays
CRT
Screen Resolution
1280x1024
Hard Drives
500 GB Sata internal :
SIIG USB 3.0 docking stations w/WD Caviar Black 6 Gb/s drives