Open Media Player and World clock replacement are stable enough to put in extras devel. I tried Qalendar once and it was good but i haven't used it much so can't say anything. beside Camera-Ui is not as stable as Nokia camera ui is. needs more work and also picture quality is not that great and also limited to 85%.

beside can't we replace filemanger with filebox or hamster filer ? or its just too early ? and is default file manger is open source or closed ?