what software to write?

what software to write? I know c ++ and php, many proxy, linux, server, and so on

Look around to find out what type of software currently sells if you need ideas on what to create.

With that knowledge you can create software as a service. You could have some kind of web panel where users can interact with an interface. The website can communicate to your bots to provide the service and report back to the website to show the results.

This could be anything from proxy scraping to keyword research, link building, account creation. The possibilities are endless.

For this you could easily charge a monthly service.

It all depends on what you're making. PHP is the best for web-based applications

Write a web based video uploader for multiple video sites (php), and also does support software (c++). Mac and windows users both can benefit from it.

thank you! have any ideas?

You should make a program like xenu link sleuth that can actually handle millions of urls and not run out of memory.

I used to be a c# developer and have written something similar using the abot nuget package, but its way to clunky for my liking. However, it works for what I need it to.

Basically you can put in a list of domains (or possibly keywords and it will find domains) it should traverse the domains inner links and log all external links. The user should be able to set a maximum/minimum crawl depth and whether it should crawl the logged external links along with a min/max depth to crawl.

Multi threaded and keeping the UI responsive would be a must.

To top it off you could check to see if the logged external links (domains) are registered or not.

I would be willing to pay upwards of 90$ one time fee for something like that, but I think a more than fair price for most would be 30-40 range.