Microsoft and Iconem recently announced the Open Notre Dame initiative. They are now calling for sharing of open data through GitHub to help restore the Lady of Paris to its former glory.
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Ubisoft has pledged €500,000 for Notre-Dame cathedral's restorations and to help raise awareness and more funds, has begun a giveaway for Assassin's Creed Unity via its Uplay client.
Earlier this morning Tim Cook took to Twitter to reveal that Apple plans to contribute money to help restore Notre Dame, the 856-year old cathedral which was engulfed in a massive fire yesterday.