In July 2015, nine ventures from Uganda, Kenya, Tanzania and South Sudan convened in Kampala, Uganda, for the second annual Unreasonable East Africa institute. According to this post by Unreasonable East Africa’s COO Kate Hanford, 2015 was an exciting year for entrepreneurship in East Africa. Uganda earned the title of the world’s most entrepreneurial country; the Global Entrepreneurship Summit was hosted in Kenya and attended by President Obama. The momentum is massive, and these companies are on the front lines. Read their stories here, and watch a short video here. Click through this slideshow to see glimpses of their work. As the year concludes, it’s time to celebrate these ventures of 2015.