dateutils

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License: The_3DFX_GLIDE_Source_Code_General_Public_License

astrodate   (Compare Project)

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License: gpl3_or_later

Joda Time   (Compare Project)

Mostly written in Java

License: apache_2

etm-tk   (Compare Project)

Mostly written in Python

License: GPL2

najitool   (Compare Project)

Mostly written in eC

License: Public_Domain

libcalby   (Compare Project)

Mostly written in C

License: gpl

Command Line Parser Library   (Compare Project)

Mostly written in C#

License: mit

uterus   (Compare Project)

Mostly written in C

License: lgpl21_or_later

truffle   (Compare Project)

Mostly written in C

License: BSD-3-Clause

ccore   (Compare Project)

License: BSD-3-Clause