The core of Buddhism is the Four Noble Truths: that dukkha (suffering) is the central reality of existence; that suffering is caused by desire and attachment; that attachment can be conquered and desire let go; and that the way to achieve this is called the Noble Eightfold Path.
As mentioned at the very end of this page, Buddhism does seem like less of a religion. Maybe I'm wrong, but when I hear about Buddhism, Buddha doesn't seem to come across as some all knowing powerful God but more as an idol.