This document contains recommendations and ideas for free scientific software based upon many years of professional usage. The direct links were correct and checked at the time of introducing them into this document but not checked very frequently since. I do not take any responsibility for contents or links away from this domain. Common sense and care is always demanded!
Nearly all software were free for governmental use or I marked them otherwise at time of introduction. Since i usually do not track changes in the using condition please confirm the legality for your application.
This list was made for Windows version but most of the producers provide versions for other operating systems too.
I would appreciate recommendations and comment for other useful software to share on these pages. Please note that I use the fully anonym google analytics service to track what pages are use how often, to know what to expand upon.