For many phones, Opera Mini gives a much easier browsing experience for Wikipedia than the built in browser. See: http://www.operamini.com/
Wikiwand - browser extension for Google Chrome and Firefox.
Kiwix - offline reader for Wikipedia and its other Wikimedia sister projects. Available for Android, Linux, iOS, Mac OS X, Windows.
GoldenDict - multiplatform dictionary browser with native support for Wikipedia, Wiktionary, the Wikimedia projects, and any MediaWiki-based website. (Experimental Kiwix zim support is in git master.)
Distracted Reader – Browser extension for Firefox and Chrome for fast search and exploration.
WikiZ - browser extension for Chrome and website
For users of Mac OS X 10.4 or newer, there is a Wikipedia Dashboard widget.
- See also Wikipedia:Searching for alternative ways of searching Wikipedia
WatchlistBot delivers realtime notifications of edits to any XMPP client.