Make all words in articles lead to new page related to the word, this can be done with programming when click on any word from article would lead to new articles but text would remain the same and standard wiki link to new article would override it or usual words or phrases.
In each edit in history make report vandalism or spam with short explanation.
Auto-sign when user begins with : but if edits inside between : an signature wouldn't sign it.
Wikibot that would automatically translate via Google Translate articles from English Wikipedia and save them to other Wikipedia's that could save more time in writing articles but only for new articles links and files would be copied by Wikibot and then replaced after translation.
Shortcuts for edit summary for example m minor edit.
When signature is changed automatically change all signature of user (I have seen that in RPG Maker games you can type name of player and that name is displayed in whole game).
TTS Text to Speech like Ekho I have read that it is possible to record ones own voice only vowels and consonants it is about one MB large and can read any text.And other languages as well.
Also pop up translation for words from Wiktionary and how much times articles were visited.
Input methods embedded in Wiki editor like Chinese.
Also when make next word in new row in Wikipedia is displayed in same row this can be a problem for writhing many words one below other.
Perhaps some translator like Google Translate which is online or for Android there are not much free quality translators today except Google Translate.
When users edit is reverted or changed by different user would notify the user in special notifications, this would help if user has hundreds or thousands of edits so that he doesn't need to search all pages.Watch page is only for some pages it would be useful to have most although user can ignore it if he wants.
Ancient Egyptian Babel for language knowledge.
Wiki template that would make active count users edits and articles.
Pop up translation from Wiktionary when mouse over word would translate it to English or other languages.English Wiktionary has millions of words (most are inflections) and you can use free OpenSource Kiwix for offline Wikipedia and Wiktionary (but Wiktionary is downloaded separately try using Google) and that offline Wiktionary could be programmed with pop up window to display articles (you can also find pop up code on Google like C++).
Display image from link to other website (not Wikipedia).
Wikihiero has some errors for example < hiero > r:r < / hiero > should display r above r but it is in the same row
rr, or Ax&x & should display next character near sign but not above it like : isn't working < hiero > G25&x < /hiero >
Ax power of soul.Some errors were already reported on Wikihiero talk page but still no response.Also there are only basic Ancient Egyptian hieroglyph for example than A100 and free OpenSource JSesh has more than A500 and about 3000 hieroglyphs while others have almost 7000. Xand2 (talk) 08:53, 12 December 2014 (UTC)