Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries.
A free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.
Geocaching is a treasure hunting game where you use a GPS to hide and seek containers with other participants in the activity. Geocaching.com is the listing service for geocaches around the world.
M. Bilal. IEEE Systems Journal, (2018)cite arxiv:1808.00348Comment: 10 pages, 8 figures, accepted for publication in a future issue of the IEEE systems Journal.
B. Yan, Y. Xu, H. Xing, K. Xi, und H. Chao. Proceedings of the Third Workshop on Hot Topics in Software Defined
Networking, Seite 163--168. New York, NY, USA, ACM, (2014)