ISPacct (formerly Brickacct) accounts the logfiles which Bintec routers spew out depending upon configurable rules. Logfile-analyzing mail accounting functionality is also included (in beta stage). It has multiple backends like text, HTML, and MySQL. It was designed and used by a small ISP and is geared towards such uses as monthly accounting per IP or per dial-in use.
QHacc is a personal accounting program based on Qt. It features double- or single-entry bookkeeping and a reconciliation window. It also provides support for memorized and split transactions, graphing, reporting, archiving, and scheduled transactions that can be based on the account balance.
Quasar is a business accounting application. From its easy to install scripts to its online help, Quasar was developed with the ordinary user in mind. You can run it on a single computer or on a network. define a single company or multiple companies as your requirements dictate, purchase products, maintain inventory, sell goods and services, manage payables and receivables, print cheques, and review your financial statements. A complete electronic "User's Guide" is available in PDF format.
Qt MySQL Budget is a GUI that allows the creation of a personal budget. The basic layout is a month selector, a tab for your allocations (budget), a tab for your expenses, and a tab showing the totals. It has a very simple design allowing the quick creation and updating of budgets to help individuals plot and track their monthly sending.