I've created apps (rss client, online bookmarking) for personal use, but I didn't bother making them into commercial products since I worried they would get just enough users for me to feel obligated to support them, but not enough to make any meaningful profit.<p>Has anyone else created a nifty app with commercial appeal? Do you sometimes feel like sharing it with the world even though you know it will be more trouble than it's worth?<p>Please share your stories.<p>Note: You don't need to share the URL--you can just describe the app.