Licensing

The Playstation 3 Software - everything within Lv0, Hypervisor (Lv1), GameOS (Lv2), VSH (XMB) and most libs - include a wide amount of open source material.

Located in (FW 4.21) :dev/flash/vsh/ressource/sysconf/credits/PS3_OSS_Noitice.txt

Displayed (second part) on XMB:Settings/System Settings/About PlayStation®3 (PS3™)

PlayStation®3

1.  AVM+
2.  eCOS
3.  Expat
4.  Free BSD
5.  FreeType2
6.  Libjpeg
7.  Libtiff
8.  Libungif
9.  MD4 Message-Digest Algorithm of RSA Data Security, Inc.
10. MD5 Message-Digest Algorithm of RSA Data Security, Inc.
11. NetBSD
12. SEE
13. Info-ZIP

Internet Browser

1.  cairo
2.  dtoa
3.  expat
4.  FreeType2
5.  hash.c
6.  ICU
7.  libjpeg
8.  libpixman
9.  libxml2
10. list.c
11. PCRE
12. trio
13. [http://www.scei.co.jp/psvita-license/webkit.html Webkit

Taken from and can be found at the official list:
http://www.scei.co.jp/ps3-license/index.html

For PSVita: http://www.scei.co.jp/psvita-license/