After that trial period (usually 15 to 90 days) the user can decide whether to buy the software or not. Trial software allows the user to evaluate the software for a limited amount of time. Demos are usually not time-limited (like Trial software) but the functionality is limited. In some cases, all the functionality is disabled until the license is purchased. Demoĭemo programs have a limited functionality for free, but charge for an advanced set of features or for the removal of advertisements from the program's interfaces. In some cases, ads may be show to the users. Basically, a product is offered Free to Play (Freemium) and the user can decide if he wants to pay the money (Premium) for additional features, services, virtual or physical goods that expand the functionality of the game. This license is commonly used for video games and it allows users to download and play the game for free. There are many different open source licenses but they all must comply with the Open Source Definition - in brief: the software can be freely used, modified and shared. Programs released under this license can be used at no cost for both personal and commercial purposes. Open Source software is software with source code that anyone can inspect, modify or enhance. Freeware products can be used free of charge for both personal and professional (commercial use).
If you do find it super helpful and would like to support the author, there are a few ways.Īfter you use Sumatra PDF for a bit you’ll almost certainly want to make it your default PDF reader, and we have instructions on how to do that in Windows 8 or Windows 10.Freeware programs can be downloaded used free of charge and without any time limitations. It even works in Windows XP you just need to use an earlier version. It works in Windows 10, Windows 8, Windows 7 and Vista.
It’s absolutely worthy of our “Windows App of the Month” award. On top of all of that – it’s free! Not just free, but open-source free. Then you can really customize it by editing the advanced settings.īe sure to check out it’s extensive keyboard shortcut list and online documentation for advanced uses etc.
You can switch between various “views”, search within documents, highlight text, add pages to favorites – all the standard stuff you’d expect. I’ve been using this app since 2008 (it’s been around that long!) and I forget how slow and bloated other PDF viewers are until I try to open a PDF on a different computer. The Sumatra PDF developer(s) have found the absolute perfect balance between features, ease of use, and speed. Sumatra PDF is a super-lightweight, incredibly fast, well supported and open source PDF (and ePub, MOBI, CHM, XPS, DjVu, CBZ & CBR) viewer for Windows.
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