mibbit

http://www.mibbit.com/

No Java, no flash. With Mibbit, chatting online is easy, just choose your nickname and press go! No sign-up is required and you can use it from wherever you are with just a web browser.

Postbox

http://www.postbox-inc.com/

Postbox works behind the scenes to catalog everything in your email. We mean everything: every bit of text, every contact, address and link. Every picture, document and attachment. It’s all in the catalog and it’s all searchable.

ATND

http://atnd.org/

おもしろい・たのしい・ためになる、そんなイベントや勉強会を個人で運営する人たちが増えています。でも運営者にとっては、告知から参加者の管理などわずらわしい作業が意外と多いもの。

ATND（アテンド）は、そんなイベントや勉強会の開催をお手伝いするシンプルなサービスです。

mibbit

http://www.mibbit.com/

No Java, no flash. With Mibbit, chatting online is easy, just choose your nickname and press go! No sign-up is required and you can use it from wherever you are with just a web browser.

twicco.jp

http://twicco.jp/

使い方はとても簡単。興味のあるグループを見つけてフォローするか、RSSを購読するだけ。もしグループをはじめたければ、Twitterで新しいアカウントを作成して、Twiccoに登録。みんなにグループを紹介してコミュニティを広げましょう。

Meeting24.tv

http://meeting24.tv/

meeting24.tv is a web conference system for up to 24 users for 24/7 and it’s free.

HelloTxt

http://hellotxt.com/

With HelloTxt you can post your status once and have it appear automatically on all of your networks, allowing you to keep all of your friends up to date with ease. It also lets you read your friends’ updates from main microblogging and social networks all at once.

Chi.mp

http://chi.mp/

Chi.mp gives you your own domain and Web site – your social hub. With chi.mp, you can bring together the many pieces of your digital life – your content, your contacts – to create “Centralized You”. And you control “who sees what”.