The software is called Stocksubmitter, it is free for up to 33 per month per agency, for more you need to pay, but 10€ for 250 photos is very reasonable. In case you have a mac, need to use the Windows version on Windows since the Mac version is not working really well. I might do a post about stock photography soon where I will recommend this software, it does safe a lot of time since you can also do all the tagging and categorizing within the software.
My photos are by far selling best on Shutterstock, also my earnings from Fotolia/Adobe Stock have been growing recently. Istock is on place three, but Alamy is catching up.