el@el-X75A1:~$ sudo apt-cache search backport
libjson-perl - Modul für die Handhabung von Daten im JSON-Format
libbackport-util-concurrent-java - backport of java.util.concurrent to Java 1.4
libbackport-util-concurrent-java-doc - backport of java.util.concurrent to Java 1.4
python-testtools - Extensions to the Python unittest library (Python 2.x)
python-unittest2 - backport of the enhanced unittest testing framework in Python 2.7
python3-testtools - Extensions to the Python unittest library (Python 3.x)
ubuntu-dev-tools - Nützliche Werkzeuge für Ubuntu-Entwickler
libparse-method-signatures-perl - Perl module to parse Perl6-like method signatures
libswingworker-java - Swing Worker API
libswingworker-java-doc - Swing Worker API
python-concurrent.futures - backport of concurrent.futures package from Python 3.2
python-configparser - backport of the enhanced config parser introduced in Python 3.2
python-enum34 - backport of Python 3.4's enum package
python-enum34-doc - backport of Python 3.4's enum package
python3-enum34 - backport of Python 3.4's enum package
ruby-backports - backports of new features for older versions of Ruby