4Media FLV to MP4 Converter
Convert FLV files to MPEG-4, MOV, H.264/MPEG-4 AVC videos for MP4 players.
Xilisoft FLV Converter
It can convert FLV to all popular video and all popular audio to audio-only FLV.
Boxoft free FLV to MP4 Converter (freeware)
Boxoft free FLV Converter helps you convert FLV MP4