Per individuare nelle vicinanze chi aderisce al Linux Day https://play.google.com/store/apps/details?id=it.mn.salvi.linuxDayOSM&feature=search_result#?t=W251bGwsMSwyLDEsIml0Lm1uLnNhbHZpLmxpbnV4RGF5T1NNIl0