The Turing Trust is a charitable foundation set up by James Turing after a visit to Ghana in 2009. He recognised that "Alan’s boundless curiosity and desire to innovate led him to create the building blocks for the modern computer, a device which has revolutionized communication, work, and social action far beyond what he might have imagined. For anyone fortunate enough to own a computer, it is a truly transformative device, one which opens up a world of opportunity... It is this philosophy, along with the inspiring legacy left by Alan Turing, which drives the Turing Trust’s passion for its projects. Whether it is the construction of computer labs and schoolhouses for the Ghanaian children which its sponsors, the donation of desktop computers to classrooms or the sending of volunteers to serve as teachers, mentors and peers to students in the ICCES schools, the Turing Trust is committed to extending opportunities to those in greatest need of them."
This seems like a great way to honor Turing's memory in his centenary year. One practical (and fun) thing you could do is hold an Alan Turing pub quiz with questions (and answers) provided by The Turing Trust. Any proceeds from a quiz you organise with your friends or colleagues can be donated online through the Trust's secure Virgin Money Giving facility.