Bitcoin was implemented as an open source code by Nakamoto and was released in January 2009. Although the true identity of Nakamoto is still unknown. The bitcoin network was incepted on that very year when Nakamoto mined the first blockchain known as genesis block.
If we want to go for the classical method, then we need to open a blockchain, put the desired address and then refresh every now and then to see the inflow of transactions to the input address. An easier alternative is to use python and query your own nodes. Experience needs to be considered in the latter.
There are a lot of sites for sponsoring altcoins. One of them is Altcoin fantasy where the users play games in order to win and sponsor coins. This is a great and unique way to attract sponsors and generate a buzz in the market for the altcoins.