Open Source Alternatives to Popular Software – OpenAlternative

OpenXcom is an open-source clone of the original UFO: Enemy Unknown (X-Com: UFO Defense in USA), licensed under the GPL and written in C++ / SDL. It was originally founded by SupSuper in February 2010, and has since grown into a small development team surrounded by a very supporting community.

Open-source projects—not just commercial open source—have served as a critical driver for the improvement of products for decades. However, some software is going to remain closed source. It’s just the nature of first-mover advantage. But when transparency and extensibility are an issue, an open-source successor becomes a real threat.