WiiFlashServerJ 0.4.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of this free Mac application is Alan Ross. WiiFlashServerJ for Mac relates to Internet & Network Tools.
From the developer:
WiiFlashServerJ passes on data received from connected Wiimotes. The data is transformed into a way WiiFlash 0.4.3 (WiiFlash.org) can handle it. Without the following libraries this free application would do absolutely nothing: WiiRemoteJ and Bluecove.
You may want to check out more Mac applications, such as OTR Proxy or Hotline, which might be similar to WiiFlashServerJ.