Firmwares
Here are some important download links for the Apple iPhone and the iPod touch. These are firmwares, jailbreaking tools and bootloaders that you shall require.
Once you have downloaded the firmware (.ipsw file) require you can simply press shift+Restore/Update button (option+Restore/update for Mac) in iTunes. A file dialog will open and let you choose the downloaded ipsw file. Downloading the file manually lets you chose the version you want to load instead of the latest version that iTunes will load by default.
Download 3.2
Update Firmware
Download iOS 4.0.1 for 3G: iPhone1,2_4.0.1_8A306_Restore.ipsw
Download iOS 4.0.1 for 3GS: iPhone2,1_4.0.1_8A306_Restore.ipsw
Download iOS 4.0.1 for (4): iPhone3,1_4.0.1_8A306_Restore.ipsw
Download iOS 4
iPhone3,1_4.0_8A293_Restore.ipsw
Download iOS 4 for iPhone 3GS
iPhone2,1_4.0_8a293_Restore.ipsw
or
iphone_os_4_gm_seed__iphone_3gs__8a293.dmgDownload iOS 4 for iPhone 3G
iPhone1,2_4.0_8a293_Restore.ipsw
or
iphone_os_4_gm_seed__iphone_3g__8a293.dmgDownload iOS 4 for iPod Touch 3G
iPod3,1_4.0_8A293_Restore.ipsw
or
iphone_os_4_gm_seed__ipod_touch__3rd_generation__8a293.dmgDownload iOS 4 for iPod Touch 2G
iPod2,1_4.0_8A293_Restore.ipsw
or
iphone_os_4_gm_seed__ipod_touch__2nd_generation__8a293.dmg
UPDATE 3.1.3
iPhone 2G iPhone1,1_3.1.3_7E18_Restore.ipsw
iPhone 3G iPhone1,2_3.1.3_7E18_Restore.ipsw
iPhone 3GS iPhone2,1_3.1.3_7E18_Restore.ipsw
iPod 3G iPod3,1_3.1.3_7E18_Restore.ipsw
1.1: iPod1,1_1.1_3A101a_Restore.ipsw
1.1.1: iPod1,1_1.1.1_3A110a_Restore.ipsw
1.1.2: iPod1,1_1.1.2_3B48b_Restore.ipsw
1.1.3: iPod1,1_1.1.3_4A93_Restore.ipsw
1.1.4: iPod1,1_1.1.4_4A102_Restore.ipsw
1.1.5: iPod1,1_1.1.5_4B1_Restore.ipsw
2.0.0: iPod1,1_2.0_5A347_Restore.ipsw
2.0.1: iPod1,1_2.0.1_5B108_Restore.ipsw
2.2.0 (1G): iPod1,1_2.2_5G77_Restore.ipsw
2.2.0 (2G): iPod2,1_2.2_5G77a_Restore.ipsw
2.2.1 (2G): iPod2,1_2.2.1_5H11a_Restore.ipsw
3.1.2 (3G): iPod3,1_3.1.2_7D11_Restore.ipsw
iPhone EDGE
iPhone1,1_3.1.2_7D11_Restore.ipsw iPhone1, 1_3.1.2_7D11_Restore.ipsw
iPhone 3G iPhone 3G
iPhone1,2_3.1.2_7D11_Restore.ipsw iPhone1, 2_3.1.2_7D11_Restore.ipsw
iPhone 3GS iPhone 3GS
iPhone2,1_3.1.2_7D11_Restore.ipsw iPhone2, 1_3.1.2_7D11_Restore.ipsw
iPod Touch 1G iPod Touch 1G
iPod1,1_3.1.2_7D11_Restore.ipsw iPod1, 1_3.1.2_7D11_Restore.ipsw
iPod Touch 2G iPod Touch 2G
iPod2,1_3.1.2_7D11_Restore.ipsw iPod2, 1_3.1.2_7D11_Restore.ipsw
iPod Touch 3G iPod Touch 3G
iPod3,1_3.1.2_7D11_Restore.ipsw iPod3, 1_3.1.2_7D11_Restore.ipsw
Firmware 3.1.1 for iPod Touch 1G
Firmware 3.1.1 for iPod Touch 2G
Firmware 3.1.1 iPod Touch 3G
.IPSW Firmware files for the iPhone ‘3GS’ / ‘3G s’ (third generation)
iPhone 3GS firmware v3.01 {iPhone 3G S (3.0.1/7A400)}
iPhone 3GS firmware v3.0 {iPhone 3G S (3.0/7A341)}
.IPSW Firmware files for the iPhone 3G (second generation)
iPhone 3G firmware v3.01 {iPhone 3G (3.0.1/7A400)}
iPhone 3G firmware v3.0 {iPhone 3G (3.0/7A341)}
iPhone 3G firmware v2.2.1 {iPhone 3G (2.2.1/5H11)}
iPhone 3G firmware v2.2 {iPhone 3G (2.2/5G77)}
iPhone 3G firmware v2.1 {iPhone 3G (2.1/5F136)}
iPhone 3G firmware v2.0.2 {iPhone 3G (2.0.2/5C1)}
iPhone 3G firmware v2.0.1 {iPhone 3G (2.0.1/5B108)}
iPhone 3G firmware v2.0 {iPhone 3G (2.0/5A347)}
.IPSW Firmware files for the iPhone 2G (first generation)
iPhone firmware v3.01 {iPhone (3.0.1/7A400)}
iPhone firmware v3.0 {iPhone (3.0/7A341)}
iPhone firmware v2.2.1 {iPhone (2.2.1/5H11)}
iPhone firmware v2.2 {iPhone (2.2/5G77)}
iPhone firmware v2.1 {iPhone (2.1/5F136)}
iPhone firmware v2.0.2 {iPhone (2.0.2/5C1)}
iPhone firmware v2.0.1 {iPhone (2.0.1/5B108)}
iPhone firmware v2.0 iPhone {(2.0/5A347)}
.IPSW Firmware files for the iPod touch 1G (first generation)
iPod touch firmware v3.0 {iPod touch 1G (3.0/7A341)}
iPod touch firmware v2.2.1 {iPod touch 1G (2.2.1/5H11)}
iPod touch firmware v2.1 {iPod touch 1G (2.1/5F137)}
iPod touch firmware v2.0 {iPod touch 1G (2.0/5A347)}
.IPSW Firmware files for the iPod touch 2G (second generation)
iPod touch 2G firmware v3.0 {iPod touch 2G (3.0/7A341)}
iPod touch 2G firmware v2.2 {iPod touch 2G (2.2/7A341)}
iPod touch 2G firmware v2.2.1 {iPod touch 2G (2.2.1/5H11a)}
iPod touch 2G firmware v2.1.1 {iPod touch 2G (2.1.1/5F138)}
Jailbreaking and Unlocking Tool Downloads
The bootloaders are generally useful while jailbreaking / unlocking the old iPhone 2G aka First generation.
BootLoader
QuickPwn
QuickPwn 2.2.5 (BitTorrent Link)(Windows)
Pwnage
PwnageTool 3.1.4
Winpwn
WinPwn Beta 0.99.2.18 (Beta 2)
WinPwn Beta 0.99.2.19 (Beta 3)
WinPwn 1.0.0.0 RC1
WinPwn 1.0.0.2 RC1
WinPwn 1.0.0.3 RC1
Ziphone
iLiberty