Samsung has recently launched their own online store for Windows Mobile phones and non-smartphones. But, clearly on their store, the focus seems to be on the Windows Mobile softwares. You can find applications of all the big software houses like SBSH and SPB.
Currently, it seems to be only focused on the UK market. The best part about it is that Samsung has included not only commercial applications, but freeware (see this link) applications too.
Go to Samsung Mobile Store