Use any graphics editor. Plenty of those around, even if you end up with one of the free Serif apps. Not what use or recommend at all, but if you want it for nothing, it will be basic. click here for what I use.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.