This amazing site calls itself an Etymological Database Project and says:
The main goal of the project is to join efforts in the research of long range connections between established linguistic families of the world. Internet is a brilliant way to combine our attempts and to build up a commonly accessible database of roots, or etyma reconstructed for the World’s major (and minor) linguistic stocks.
Every person or organization interested in this noble task is invited to join.
As regular readers of Languagehat know, I’m deeply skeptical of attempts to connect all the world’s languages into one big happy family, but I have nothing but praise for this project. I haven’t really started investigating it yet, but the idea of a site joining etymological databases of North Caucasian, Sino-Tibetan, Yenisseian, Chinese and Chinese Dialects, Altaic, Chukchee-Kamchatkan, Dravidian, Semitic, Bahnar, North Khoisan, South Khoisan, and Central Khoisan has me salivating. This link is from the invaluable PF, who explains:
Let’s say you know the Tibetan word a~khrog-pa, to roar, rush. You enter in the word here, and you get this page, which gives you the protoform *r[a:]kw|, which meant noise or roar, and words from the same root in Chinese, Burmese, Kachin, Lushei, Lepcha and Kiranti, along with their meanings.
Or let’s say if you know the turkic root *bora-, in the Turkish word for north wind (bora(k)) and the Kazakh word to snow heavily (bora-), you look it up in the the Turkic database, and it gives you the conjectured proto-Altaic root of the word (*po> u, to snow or rain) and the parallel roots in other Altaic language groups. In Mongolian languages, the root is *borug|a, meaning 1) heavy rain or 2) to snow or sleet; In Middle Mongolian the word was boro’an, in Khalka (Mongolian Mongolian) it’s 1) boro:(n) for heavy rain and 2) burgana- for snow or sleet, in Buryat it’s 1) boro: 2) burga- and so on. And you get the same for the Tungus group, for the Turkic group (of course), and for Japanese and Korean! Neat, no?