PS3 - PS3Xploit Flash Writer (4.90 HFW)

PS3 HEN 4.90 Is Here! I'll Show You How To Get It

PS3 - 4.88.1 HFW (Hybrid FirmWare)

PS3: CFW Evilnat 4.90 released

PS3 - CFW 4.90 Evilnat Cobra (8.4) (CEX/DEX/PEX/D-PEX)

PS3: Homebrew ENabler 3.0.3_4.88 released for Firmware 4.88

PS3 - HFW 4.90.1 (Hybrid Firmware), Page 11

Dark Space HEN 4.90

How To Install the Latest PS3Hen/HFW 4.89.1 {On Any PS3}

PS3 - Official Update v4.90 is Live! Official CFW/HFW Released!, Page 8

New Flash Writter came out for 4.90(requires HFW 4.90) and it's recognized by the PS3Xploit team : r/ps3hacks