C/BOOKS consists of nine easy-to-use, fully-integrated accounting software modules that provide tools for working with accounts receivable, accounts payable, general ledger, order entry, inventory control, payroll, fixed assets, job costing, and purchase orders. It features an interactive visually-driven system with a consistent user interface. Online help is available for every input to explain the function keys and fields on the screen. It can be customized to meet a company's needs with the C/BASE 4GL application generation system, with which you can change file structures, report formats/layouts, and data input screens. Also, new applications created with C/BASE 4GL or C code can be linked to C/BOOKS accounting modules.
GnuCash allows you to track bank accounts, stocks, income, and expenses. As quick and intuitive to use as a checkbook register, it is based on professional accounting principles to ensure balanced books and accurate reports. It is backed by an active development community and is blossoming into a full-fledged accounting system.
QOF (Query Object Framework), provides a set of C Language utilities for performing generic structured complex queries on a set of data held by a set of C/C++ objects. This framework is unique in that it does not require SQL or any database at all to perform the query. Thus, it allows programmers to add query support to their applications without having to hook into an SQL database.
Grisbi is personal accounting software that can manage multiple accounts, multiple currencies, and multiple users. It manages third parties, expenditures and receipts categories, and also budgetary lines, financial years, and other information. It is adapted for personal use as well as for associations.
ipt-netflow is high performance NetFlow exporting module for Linux kernel (up to 3.x). It is designed for Linux router with heavy network load. This is netfilter/iptables module adding support for NETFLOW target. It is designed to work without conntrack. It supports NetFlow protocols versions 5, 9, and IPFIX. It has accounting for IPv4, IPv6 traffic, and (NEL) NAT translation events.