There are numerous PC contest logging software packages availble nowadays. Here are a few of the more poular ones.
N1MM PLUS possibly the most popular of the free logging software packages.
SD LOG a popular logging suite from paul EI5DI.
DXLog by Kris 9A5K. A paid for suite on a yearly basis regardless of how many updates.
Win Test Another paid for suite. you pay initially then for the updates.
Skookumlogger for Mac users.
UCX LOG contest and general logging suite.
Write Log Write Log for windows
Gen Log By W3KM
DX4WIN by paul KK4HD.
Survey this is a link to a survey run by 425DXN on contest logging programmes, with links to all the web sites.
all links correct at the time of publishing. Nov 2016.