main options
gnucash
- personal and small-business financial-accounting software
eqonomize
- personal accounting software for the small household economy
homebank
- Manage your personal accounts at home
tried
beancount
- Double-entry accounting from text files
- command-line usage
grisbi
- personal finance management program
hledger / hledger-ui / hledger-web
- command-line double-entry accounting program
smtm
- Show Me The Money is a configurable Perl/Tk stock ticker program
not tried
gretl (purpose: econometrics)
- GNU Regression, Econometric & Time-Series Library
kmymoney (KDE-based)
- personal finance manager for KDE
ledger (requires libpython2.7)
- command-line double-entry accounting program
ledgersmb (requires apache2)
- financial accounting and ERP program
misery (launch error)
- Simple accounting package for groups, clubs, holidays
postbooks (too complex server-client setup)
- multi-user accounting / CRM / ERP suite (GUI)
skrooge (KDE-based)
- personal finance manager for KDE