Template:Wikipedia

Wikipedia – The Free Encyclopedia — is "the free wiki encyclopedia that anyone can edit". Brainchild of Jimmy Wales (and others); and the original project of the subsequent Wikimedia Foundation (WMF), Wikipedia's stated objective is to have an officially 'neutral point of view' (NPOV); but is often accused by people on each side of the political or other spectrums of being biased towards the other side. Wikipedia is the biggest fish in the global wiki pond, and receives far more traffic, and editing activity, than any other wiki. However, despite Wikipedias' claim to being an 'encyclopedia'; many academic institutes and other professional organisations recommend that Wikipedia is not used as a primary source of information, due to the fact that many articles are frequently incorrect, and many articles have a seemingly extremely low threshold of 'reliable source' references and citations. Indeed, many Wikipedia articles fail their own verifiability criteria, and can remain for many years without any citations, dispite warning banners highlighting the lack of said citations (and threatening to delete said unreferenced articles), and this even includes biographical articles for living people. Also, the English Wikipedia allows articles to be 'promoted' to a good article (GA) status despite failing their own criteria on having adequate reliable source citations, editorial conjecture, and even original research. 

Historically, when Wikipedia was founded, it released all textual wiki content under the GNU Free Documentation License (GFDL). However, during 2009, existing Wikipedia wikis migrated to a new license – the Creative Commons Attribution-Share Alike 3.0 unported license (CC-BY-SA 3.0); and all content published until that migration date could be retro-released under either or both licenses. All content published after the migration date is released under only the CC-BY-SA 3.0 license, as are any newly created Wikipedia language versions. 
 * Wikipedia — at Wikimedia Meta-Wiki
 * Wikipedia Statistics — stats.Wikimedia.org at Wikimedia Statistics
 * Wikipedia Interactive Statistics — from Wikistatistics.net
 * List of Wikipedias — from WikiStats by S23.org
 * Wikipedia database list — at noc.Wikimedia.org
 * Wikipedia.org site info — from Alexa.com
 * One of the many mashups stemming from Wikipedia, PlaceOpedia, linking wiki articles with their physical place
 * The Wiki Game — explore & race through Wikipedia articles
 * Wikipedia-Watch.org — an interesting site exposing some core Wikipedia policies
 * the wikipedia review — an internet forum critiquing Wikipedia policies, editors and administrators
 * Wikipedia at Everything2 — a personal commentary by AxelBoldt on Wikipedia policies and issues
 * Reasons not to contribute to Wikipedia — Encyc.org
 * See also
 * Deletionpedia – Deleted from Wikipedia — is an archive of pages which have been deleted from the English Wikipedia
 * MARJORIE-WIKI — encyclopedia of deleted German Wikipedia articles
 * PlusPedia — saves deleted article pages from the German Wikipedia encyclopedia, and is a German equivalent of Deletionpedia
 * Speedy deletion Wiki — a Wikia lifestyle wiki, consisting of wiki pages deleted from the English Wikipedia under their 'Speedy Deletion' criteria.

As of March 2013, Wikimedia Meta-Wiki indicates that there are 285 Wikipedias of different languages, and also groups them by size.
 * All Wikipedias in these languages: (edit)

1 000 000+ : ref Deutsch (de), English (en), Français (fr), Italiano (it), Nederlands (nl), Polski (pl), Русский (ru), Svenska (sv) 100 000+ : ref العربية (ar), Български (bg), Català (ca), Sinugboanon (ceb), Česky (cs), Dansk (da), Esperanto (eo), Español (es), Eesti (et), Euskara (eu), فارسی (fa), Suomen kieli (fi), Galego (gl), עברית ויקיפדיה (he), हिन्दी (hi), Hrvatska (hr), Magyar (hu), Հայերեն (hy), Bahasa Indonesia (id), 日本語 (ja), Қазақша (kk), 한국어 (ko), Vicipædia (la), Lietuvių (lt), Bahasa Melayu (ms), Nynorsk (nn), Norsk (Bokmål) (no), Português (pt), Română (ro), Srpskohrvatski / Српскохрватски (sh), Simple English (simple), Slovenčina (sk), Slovenščina (sl), Српска (sr), Türkçe (tr), Українська (uk), O‘zbek (uz), Tiếng Việt (vi), Volapük (vo), Winaray (war), 中文 (zh) 10 000+ : ref Afrikaans (af), Alemannisch (als), Ahmaric (am), Aragonés (an), Egyptian Arabic (arz), Asturianu (ast), Azərbaycan (az), Башҡорт (ba), Žemaitėška (bat-smg), Беларуская (be), Беларуская (тарашкевіца) (be-x-old), বাংলা (bn), ইমার ঠার/বিষ্ণুপ্রিয়া মণিপুরী (bpy), Brezhoneg (br), Bosanska (bs), Basa Ugi (bug), Soranî / کوردی (ckb), Чăваш (cv), Cymraeg (cy), Ελληνικά (el), Frysk (fy), Gaeilge (ga), Gàidhlig (gd), ગુજરાતી (gu), Fiji Hindi (hif), Krèyol Ayisyen (ht), Interlingua (ia), Ido (io), Íslenska (is), Basa Jawa (jv), ქართული (ka), ಕನ್ನಡ (kn), Kurdî / كوردی (ku), Кыргызча (ky), Lëtzebuergesch (lb), Lombart (lmo), Latviešu (lv), Basa Banyumasan (map-bms), Malagasy (mg), Македонски (mk), മലയാളം (ml), Монгол (mn), मराठी (mr), Burmese (my), مَزِروني (mzn), Napulitano (nap), Plattdüütsch (nds), नेपाली (ne), नेपाल भाषा (new), Occitan (oc), Piemontèis (pms), Punjabi (pnb), Runa Simi (qu), Armãneashce (roa-rup), संस्कृतम् (sa), Саха тыла (sah), Sicilianu (scn), Scots (sco), Sinhalese (si), Shqip (sq), Basa Sunda (su), Kiswahili (sw), தமிழ் (ta), Telugu (te), Тоҷикӣ (tg), ไทย (th), Tagalog (tl), Tatarça (tt), اردو (ur), Vèneto (vec), Walon (wa), ייִדיש| (yi), Yorùbá (yo), Bân-lâm-gú (zh-min-nan), 粵語 (zh-yue) 1 000+ :ref Bahsa Acèh (ace), Eald Englisc (ang), ܐܪܡܝܐ (arc), অসমীয়া (as), Авар (av), Aymar (ay), Boarischn (bar), Central Bicolano (bcl), भोजपुरी (bh), Banjar (bjn), བོད་སྐད (bo), Буряад (bxr), Chavacano de Zamboanga (cbk-zam), Нохчийн (ce), Corsu (co), Qırımtatarca (crh), Kashubian (csb), Zazaki (diq), Dolnoserbski (dsb), ދިވެހިބަސް (dv), Emiliàn e rumagnòl (eml), Estremeñu (ext), Võro (fiu-vro), Føroyskt (fo), Arpitan (frp), North Frisian (frr), Furlan (fur), Gagauz (gag), 贛語 (gan), گیلکی (glk), Avañe'ẽ (gn), Gaelg (gv), Hak-kâ-fa / 客家話 (hak), Hawai`i (haw), Hornjoserbsce (hsb), Interlingue (ie), Ilokano (ilo), Lojban (jbo), Taqbaylit (kab), Kabardian Circassian (kbd), Kalaallisut (kl), Khmer (km), Komi-Permyak (koi), Къарачай-Малкъар (Qarachay-Malqar) (krc), Ripuarian (ksh), Коми (kv), Kernewek (kw), Dzhudezmo (lad), Lak (lbe), Lezgian (lez), Limburgs (li), Líguru (lij), Lingála (ln), ລາວ (lo), Мокшень (Mokshanj Kälj) (mdf), Олык Марий (Olyk Marij) (mhr), Māori (mi), Hill Mari (mrj), Malti (mt), Mirandesa (mwl), Эрзянь (Erzjanj Kelj) (myv), Nahuatl (nah), Nedersaksisch (nds-nl), Novial (nov), Normaund (nrm), Diné bizaad (nv), ଓଡ଼ିଆ (or), Ирон æвзаг (os), ਪੰਜਾਬੀ (pa), Pangasinan (pag), Kapampangan (pam), Papiamentu (pap), Picard (pcd), Deitsch (pdc), Palatinate German (pfl), पाऴि (pi), پښتو (ps), Rumantsch (rm), Tarandíne (roa-tara), Rusyn (rue), Ikinyarwanda (rw), Sardu (sc), Sámegiella (se), Shona (sn), Soomaaliga (so), Sranantongo (srn), Seeltersk (stq), Ślůnski (szl), تركمن (tk), Faka Tonga (to), Tok Pisin (tpi), Удмурт (udm), Oyghurque (ug), Vepsian (vep), West-Vlams (vls), Wolof (wo), 吴语 (wuu), Хальмг (xal), Mingrelian (xmf), Zeêuws (zea), 古文 / 文言文 (zh-classical) 100+ :ref Аҧсуа (ab), Akana (ak), Bislama (bi), Bamanankan (bm), Mìng-dĕ̤ng-ngṳ̄ (cdo), Chamoru (ch), Cherokee (chr), Cheyenne (chy), Nehiyaw (cr), Словѣньскъ (cu), ཇོང་ཁ (dz), Eʋegbe (ee), Fula (ff), Fijian (fj), Gothic (got), هَوُسَ (ha), Igbo (ig), Iñupiak (ik), ᐃᓄᒃᑎᑐᑦ (iu), Qaraqalpaqsha (kaa), KiKongo (kg), Gĩkũyũ (ki), कश्मीरी / كشميري (ks), Luganda (lg), Latgalian (ltg), Молдовеняскэ (mo), Dorerin Naoero (na), Northern Sotho (nso), Chichewa (ny), Oromoo (om), Norfuk (pih), Ποντιακά (pnt), romani - रोमानी (rmy), Kirundi (rn), سنڌي، سندھی ، सिन्ध (sd), Sängö (sg), Gagana Samoa (sm), SiSwati (ss), Sesotho (st), Tetun (tet), Tigrinya (ti), Setswana (tn), Xitsonga (ts), Tumbuka (tum), Twi (tw), Reo Mā`ohi (ty), Тыва (tyv), Tshivenda (ve), isiXhosa (xh), Cuengh (za), isiZulu (zu) 10+ :ref Choctaw (cho), Sichuan Yi (ii), Marshallese (mh), Ndonga (ng) 1+ :ref Afar (aa), Hiri Motu (ho), Kuanyama (kj), Kanuri (kr), Muscogee (mus) 0 articles in language (other than main page) :ref Herero (hz) Depreciated :ref tlhIngan Hol (Klingon) (tlh), Toki Pona (tokipona) Other : Wikipedia 10 (ten), Wikipedia Test Wiki (test), test2.Wikipedia (test2), Nostalgia Wikipedia (nostalgia), In Memoriam (sep11)
 * The red-links above need the infobox template, their Wikipedia URLs, the  template and the  template added.

Try to keep this on track; have a look at list of Wikipedias on Meta-Wiki