Esse é o Installous. O source no Cydia é http://cydia.hackulo.us

Você pode usar fazendo download direto do aplicativo no Iphone (Method 0) ou ainda usando o FTP (Eu usei o WinSCP, com wifi, descobri o ip do Iphone e loguei como root e senha  alpine  (Method 2) quando você baixa um ipa ou app e copia direto para o Iphone no diretório /Private/var/mobile/Library/Downloads.

link original (http://iphone.cazisoft.com/?p=285)

Method 0 (Using Installous, stand alone)

1. Open Cydia, add this source: http://cydia.hackulo.us
2. Still in Cydia, install “Installous ver 2.0″
3. Quit Cydia
4. Reboot iPhone
5. Open Installous
6. Select browse tab!
7. Navigate to home Screen by pressing home!
8. Download the ipa file
9. Go to Downloads tab
10. Tap on the ipa file then select INSTALL!

Method 2 (Using Installous together with PC/Mac)

1. Open Cydia
2. Add this source: http://cydia.hackulo.us
3. Still in Cydia, install “Installous”
4. Still in Cydia, install “OpenSSH”
5. Quit Cydia
6. Reboot iPhone
7. Connect iPhone to PC/Mac (Using WiFi)
8. Connect to the iPhone using SSH connection (WinSCP ,CyberDuck , etc) “Username: root Password: alpine”
9. Navigate to “/Private/var/mobile/Library/Downloads “
10. Copy “.ipa” files to this folder
11. At this time you see a list of applications that previously copied to the “Downloads” folder
12. Click on the application name then click install.