The British Interplanetary Society is sponsoring a number of ChipSat microsatellites or 'Sprites', and is studying a microsat solar sail mission:

As you well know, the British Interplanetary Society was founded in 1933 and is the oldest space organisation still in its original form. Throughout its history it has continued to inspire and advocate activities relating to the exploration of space. In particular, it has undertaken theoretical design projects and facilitated meeting opportunities between like-minded people, keen to push their ideas forward. Despite these very valuable contributions it has never put any hardware into Earth orbit itself. That is about to change. We are pleased to announce that The British Interplanetary Society has joined the KickSat.org project and intend to sponsor several ChipSats to place into orbit and form the first fleet of spacecraft for this mission. A design team is being assembled to work on some innovative engineering concepts. We are very excited about this project and further announcements with more details will be made by the BIS at a later date.

KickSat is the initiative of Zac Manchester, a graduate student at Cornell University in the United States. The BIS are very grateful for the opportunity to participate in Zac’s excellent project and we are pleased to support him in pioneering this technology.

• BIS announcement letter, including information on donating to the ChipSat project.
• BIS ChipSat poster