Platnik is described as 'enables people in Poland to send social insurance documents in electronic form to Zaklad Ubezpieczen Spolecznych'. There are more than 25 alternatives to Platnik for a variety of platforms, including Windows, Mac, Linux, iPhone and Android. The best alternative is GnuCash, which is both free and Open Source. Other great apps like Platnik are Money Manager Ex (Free, Open Source), KMyMoney (Free, Open Source), Ledger (Free, Open Source) and Receipts (Freemium).
Money Manager Ex is a free, open-source, cross-platform, easy-to-use personal finance software. It primarily helps organize one's finances and keeps track of where, when and how the money goes. It is also a great tool to get a bird's eye view of your financial worth.
KMyMoney is a cross-platform personal finance manager built on KDE frameworks technologies for your desktop and notebook environment. It enables users to keep careful track of their personal finances by providing a broad array of financial features and tools.
Ledger is a powerful, double-entry accounting system that is accessed from the UNIX command-line. This may put off some users, since there is no flashy UI, but for those who want unparalleled reporting access to their data there are few alternatives.
Grisbi is a personal accounting application running under GNU/Linux and Windows, released under the GPL licence. Our aim is to provide you with the most simple and intuitive software for basic use, and still very powerful if you spend a little time on the setup.
Quicken is Americas #1 personal finance software. Make money management easy. Take control of your personal finances. Quicken makes it easy to manage your spending, stay on top of day-to-day finances, and stick to a budget.