An oldie (but a goodie). Ichiro is still around, and has apparently updated Synth1 to version 1.13 (beta) including a 64 bit version. I loaded it up and dug out my old colour settings, and my preset folders - et voila! Still as awesome as ever. What a great synth and an unexpected surprise to see a 64 bit version from this old freeware classic synth.
Cheers!
http://www.geocities.jp/daichi1969/softsynth/

....and it also features....
 
DTMソフトで使用することを目的としたソフトウェアシンセサイザーです。 VSTiプラグイン/AUプラグイン形式に対応しています。本ソフトはフリーウェアです。最新バージョンはVer1.12(Windows), Ver1.13beta(Mac)です。
機能的には、あの赤いシンセ Clavia NORD LEAD2を手本にしていて、下記の特徴があります。

• 2オシレータ+1サブオシレータ、FM変調、リング変調、シンクロ、モジュレーションエンベロープ
• 4タイプのフィルタ、ディストーション
• 2LFO(ホスト同期可能)
• アルペジエ－タ搭載（ホスト同期）
• テンポディレイ（ホスト同期）、ステレオコーラス/フランジャ搭載
• レガートモード、ポルタメント
• 32音ポリフォニック
• プリセット128音色つき。
• 動作軽量化の徹底。SSE利用等。
• オートメーション対応

 
 
(j/k Brando)
 
I'm going to pull this one out as well...

LOL 
Ya - but how could you not love
プリセット128音色つき。
動作軽量化の徹底。SSE利用等。
and
オートメーション対応
 
 

I gotta admit...I'm pretty pumped that Synth1 is 64-bit.
 
The legend continues. 

i'm impressed geocities still exists

Translated (well translated according to Google) he says and I quote:-
 
"

• ☆ ~ / HIROYA buttobase synth Synth One high Viva! ~ (2,553 KB)

By Mr. HIROYA, it is techno pop very catchy. All parts, including the rhythm parts have been made ​​in Synth1. [class="goog-text-highlight"]Moment when 20 cars what that number! I heard, I was surprised at the high quality of the much used at the same time. Technology sense also is distinguished. Thank you will be adopted as the demo songs. (2002.11.8) ※ copyright of works in which Mr. HIROYA owned, unauthorized use, reproduction, etc., please refrain at all. : Contact to Mr. HIROYA hiro@zelfx.com"
 
Emm, not sure the old google translate works that well with Japanese!!!!!!
 
 

I translated it as - 'Free and now 64bit.'

I'm very happy about this. Back in the day, when I didn't have much money, this was my go to synth.  Made some nice music with this.  Thanks Ichiro!
 
http://www.youtube.com/watch?v=6KUj9MUODEU

Cool. 
It's easy to forget gems like this.
 
Thanks for the news update!
...Steven

+1    I haven't used it in years, but when I did I really liked it.   Now in 64bit I may have to dig back in a little...