What is the best software for pricing and estimating?

Rather than excel , Cost X very easy and time consuming software.

Economic estimation with local available materials and labour with high quality and durable output

Questor Is a good estimation software however it is always better to use 1/6 method using pricess of a similar intent unit adding inflation factor as per last decade record exponentially to get approximate results.

B2W Estimate - Estimating & Bidding

Commonly & most powerful tools:

Autocad & Microsoft excel

Site Experience & Proper Drawing understanding.

Pro-Contractor Estimating

Autodesk Rivit

Auto Cad with Excel

best software is your mind, your market survey, and you having the awareness of how things are done at the site. 

ProContractor Estimating

B2W Estimate

ProEst Estimating

EasyEst Pro

Candy, Precission estimation, planswift