Yes there are...
You can find in Ubuntu Synaptic Package Manager:

1. Geneweb- allows to keep track of ancestral data. It is a powerful
system for maintaining a set of data about your family history. It
supports much of the GEDCOM tag system for data storage, and can be
used either as your primary system for archiving genealogical data,
or as a web service (through a CGI interface) for publishing your
data for others to use.

2. Gramps- the Genealogical Research and Analysis Management Programming System,
is an Open Source genealogy
1. Geneweb- allows to keep track of ancestral data. It is a powerful
system for maintaining a set of data about your family history. It
supports much of the GEDCOM tag system for data storage, and can be
used either as your primary system for archiving genealogical data,
or as a web service (through a CGI interface) for publishing your
data for others to use.

2. Gramps- the Genealogical Research and Analysis Management Programming System,
is an Open Source genealogy program written in Python, using the GTK/GNOME
interface.

3. LifeLines- a genealogy program that runs on UNIX systems in text mode. It
maintains genealogical records (persons, families, sources, events and others)
in a database, and generates reports from those records.

4. Taxbird- a GNOME based graphical user interface to gather and send
tax declarations to the German inland revenue office. This is a replacement for
the proprietary application "ElsterFormular" maintained by the inland revenue
offices.

5. EekBoek is a bookkeeping package for Dutch users; it creates reports like a
balance sheet ("Balans"), a general journal ("Journaal"), a general ledger
("Grootboek") and a VAT report ("BTW Aangifte").

6. Gnucash- can track finances in multiple accounts, keeping running
and reconciled balances. It has an X based graphical user interface,
double entry, a hierarchy of accounts, expense accounts (categories),
and can import Quicken QIF files and OFX files.