These things take time, and in this case the program in question may not ever see a public release simply due to legality issues.
Indeed, its already amazing enough we has OS launcher in the first place
Someone needs actively to spend hours and hours of work to be able to do this. And many of the best programmers here don't have any or very little time to do this.
Take Lionel Debroux for example, the original author. He has a fulltime job (IIRC), but still manages in the little time he got to work on TiLP and keep it up to date. This is an amazing job, and it would be unfair to ask more of him.