Licensing

The Playstation Vita uses open source available material for most of its system resources.

Playstation Vita

1.      blist
2.	bzip2
3.	Cyrus SASL
4.	FreeBSD
5.      FreeType2
6.	giflib
7.	libEtPan!
8.	libjpeg
9.	libpng
10.	libtiff
11.	MD5
12.	NetBSD
13.	squish
14.	strlcpy
15.	zlib

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.    Webkit

Welcome Park

1.	Boost
2.	FLANN
3.	OpenCV

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