The Flak 30 and improved Flak 38 were 20 mm anti-aircraft guns used by various German forces throughout World War II. It was not only the primary German light anti-aircraft gun but by far the most numerously produced German artillery piece throughout the war. It was produced in a variety of models, notably the Flakvierling 38 which combined four Flak 38 autocannons onto a single carriage.

The 7.5 cm GebirgsKanone 06 was a mountain gun built by Krupp that was used by several countries during the 1900s.
The 8.4 cm Feldgeschütz Ord 1871 is a 19th-century Swiss and Dutch field gun. The Dutch version was known as Kanon van 8 cm achterlaad. The Swiss version was replaced by the 8.4 cm Feldgeschütz Ord 1879. The Dutch version was replaced by the 8 cm staal.
The 8.4 cm Feldgeschütz Ord 1879 is a 19th century Swiss field gun. It replaced the 8.4 cm Feldgeschütz Ord 1871. The difference was that the Ord 1879 had a barrel of steel instead of bronze. The steel barrel was made by Krupp in Essen, Germany. The carriage was made by the Eidgenössische Konstruktionswerkstätte in Thun.
The Fahrpanzer was a mobile artillery piece made prior to World War I in Germany, implemented in several German fortifications from 1890 onwards and exported to several foreign military powers prior to the outbreak of hostilities.

The Oerlikon GDF or Oerlikon 35 mm twin cannon is a towed anti-aircraft gun made by Oerlikon Contraves. The system was originally designated as 2 ZLA/353 ML but this was later changed to GDF-001. It was developed in the late 1950s and is used by around 30 countries.
The Pak 57 was an Swiss anti-tank gun used by the Swiss army.

Skyshield is a short range ground-based air defence system developed by the German corporation Rheinmetall based on the work of the subsidiary Swiss company Oerlikon Contraves.
The Oerlikon-Bührle SNORA and SURA-D are 81-mm and 80-mm rockets developed in Switzerland in the late 1970s and fielded in the 1980s. The SNORA could be used in both air-to-surface and surface-to-surface rocket artillery roles, while the SURA-D is an air-to-surface rocket. The SNORA was developed as a cooperative endeavor with the Italian firm SNIA-Viscosa.
The Solothurn ST-5 is a 20 mm anti-aircraft gun designed by Solothurn in Switzerland which ultimately was the design basis for the highly successful 2 cm FlaK 30 series of guns used by Germany in World War II.