Are there any disassembler which provide a feature set comparable to IDA Pro?
I'm interested in both free and commercial products. Please use one answer per product and if possible write a short comment about it, like "easy to use", "many features", "only support for PE files", ...
Not to my knowledge. IDA Pro is clearly the best disassembler around. To the point that even the free (old) version of IDA (4.9) doesn't have a real challenger.
For the sakes of providing a comparison, you might want to try PVDasm